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Wikipedia’s ‘Supreme Court’ tackles alleged conspiracy to distort articles on Holocaust
(JTA) — When a pair of professors earlier this month published a paper accusing a group of Wikipedia editors from Poland of revising articles to distort the history of the Holocaust, their research went viral.
Most academic articles are seen by dozens or hundreds of people at best. This one, published in The Journal of Holocaust Research, hit more than 27,000 pageviews within weeks.
The paper’s reach was fueled by its analysis, unprecedented in the academic literature on Wikipedia, and its finding that a dedicated group has for some 15 years manipulated a source of information used by millions in ways that lay blame for the Holocaust on Jews and absolve Poland of almost any responsibility for its record of antisemitism.
The paper caught the eye of not just scholars and journalists but of the people in charge of resolving disputes over editing on crowd-sourced Wikipedia, the seventh-most popular website on the internet and one that is seen as the last bastion of shared truth in an ever-fracturing online environment.
Typically, disputes among Wikipedia editors are resolved through community consensus mechanisms, but occasionally those mechanisms fail and allegations are brought to Wikipedia’s Arbitration Committee, a panel of elected editors known as Wikipedia’s Supreme Court.
“Wikipedia is not exactly democratic but anarchistic in a way that actively discourages any sort of an authority coming to solve a dispute,” said Joe Roe, a veteran Wikipedia editor who served on the committee in 2019 and 2020. “The Arbitration Committee is a very limited exception.”
In this case, something especially unusual happened. The Arbitration Committee, or ArbCom, decided to look into the allegations without receiving a formal request to do so. No one could recall the committee taking such a step in its nearly two decades of existence.
“A myopic decision here could result in untold numbers of people being fed a distorted view of Jewish/WWII history, which could have very real consequences given the recent amplification of violently antisemitic rhetoric by mainstream public figures,” wrote a user named SamX in a public post about the case. “ArbCom needs to get this right.”
The article that triggered the opening of the case was published under the title, “Wikipedia’s Intentional Distortion of the History of the Holocaust.” It accused 11 current and former editors of intentional distortions to numerous articles relating to the Holocaust in Poland. The paper referred to the editors by their usernames but also provided their real names if they had publicly identified themselves on Wikipedia message boards.
“Due to this group’s zealous handiwork, Wikipedia’s articles on the Holocaust in Poland minimize Polish antisemitism, exaggerate the Poles’ role in saving Jews, insinuate that most Jews supported Communism and conspired with Communists to betray Poles, blame Jews for their own persecution, and inflate Jewish collaboration with the Nazis,” wrote co-authors Jan Grabowski, a historian at the University of Ottawa, and Shira Klein of the history department at Chapman University in Orange, California.
Normally, mistakes on Wikipedia, whether intentional or not, can be quickly fixed by experienced editors who deploy a set of rules regarding sourcing and style. But in this case, the alleged distortionists know Wikipedia’s mechanisms well enough to at least appear to follow the rules and are willing to spend time arguing with other editors who step in to intervene. It becomes harder to get to the truth because they work to discredit established historians and prop up fringe voices to create the semblance of a real-world debate over historical events, according to the article.
In one of the dozens of examples documented in the study, the alleged distortionists have tried to pass the self-published work of an antisemitic Polish writer named Ewa Kurek as a reliable source. Kurek has said that COVID-19 is a cover for an attempt by Jews to take over Europe and that Jews enjoyed life in Nazi ghettos. An editor named Volunteer Marek argued in a backstage conversation among editors that Kurek should be cited as any “mainstream scholar” would be. And another editor, working on an article about a 1941 massacre of Jews in Poland, added Kurek’s claim that minimized the number of Jewish victims and exonerated Polish perpetrators.
Jewish school children pose for a portrait in the 1930s in Wizna, near Jedwabne, Poland. New research revealed that members of the Polish community killed their Jewish neighbors on July 10, 1941 during World War ll despite previous claims that Nazi Germans were entirely responsible. Polish President Aleksander Kwasniewski apologized for the massacre of hundreds of Jews by their neighbors during ceremonies marking the 60th anniversary of the murders. (Laski Diffusion/Getty Images)
One thing the research didn’t discuss is what motivates these editors to invest so much time and effort into distorting Wikipedia. Klein said the omission was deliberate.
“We’ve been very careful not to make any assumptions on what drives them or what their politics are,” Klein said. “Instead, we’ve tried to focus just on what they’ve done, which is in the written record. And as we say in the article, we don’t see any evidence of them being tied to a government or being in the service of anyone else.”
Klein’s disclaimer obliquely points to a larger challenge around the historical record of the Holocaust in Poland. A central tenet of the country’s ruling Law and Justice party is defending the image of ethnic Poles and imposing nationalist narratives on the past, especially the period of World War II. While history shows that many Poles participated in the persecution of Jews, Poland’s nationalist right insists on portraying Poles only as victims or heroes.
In 2018, the Polish government passed what’s known as the Polish Holocaust Law, which makes it illegal to slander the Polish nation or blame the country for Nazi crimes. In practice, the law has served to censor scholars and chill debate.
Grabowski, Klein’s co-author on the paper, has for years sparred with the nationalist right over Poland’s historical memory. He sued a Polish group that accused him of publishing lies about Polish history in 2018, and in 2021 was ordered by a Polish court to apologize for his research before an appeals court ultimately overturned the order.
Domestically, Poland’s ultranationalists have largely won the war over the public discourse, which has freed them to focus on the global scene, where English-language Wikipedia is regarded as a major battlefront.
In this atmosphere, even something as basic as the background of Yiddish novelist and Nobel prize laureate Isaac Bashevis Singer can become fodder for debate. For years, Singer was at the center of a fight between two editors over whether Singer was best described in the first line of his Wikipedia article as a Jewish or Polish author. The eventual compromise — “Polish-born Jewish American” — lasted for almost two years until Feb. 23 when someone again dropped the “Jewish.”
The Wikipedia editors now being accused of distorting articles to further nationalist narratives have rejected the allegations against them.
“I have not engaged in any ‘Holocaust distortion,’ on Wikipedia or anywhere else. I am not a ‘right-wing Polish nationalist,’” said Volunteer Marek in a public comment on a Wikipedia message board that was endorsed by at least one other alleged distortionist. “I am not part of some nefarious ‘Polish conspiracy’ on Wikipedia which seeks to manipulate content. All of these accusations are ridiculous and absurd. They are particularly disgusting and vile since they go against everything I believe in.”
In the debate about how to handle the case, dozens of arbitrators and ordinary Wikipedia editors — all volunteers — spoke of the situation on a Wikipedia message board as something close to an existential crisis for Wikipedia. Not only was the website accused of being used to spread antisemitic propaganda, but it was also alleged to be vulnerable to large-scale manipulation by a small group of bad-faith actors.
There is little confidence in the community that a solution is within reach. By its own rules, the committee isn’t supposed to decide on disputed information. It’s more of a disciplinary body that evaluates the behavior of Wikipedia editors and can ultimately decide whether to restrict their editing privileges or ban them outright.
But figuring out if the accused editors have indeed evaded safeguards and undermined Wikipedia’s integrity would seem to require that the arbitrators become experts on the history of the Holocaust in Poland.
The decision to take up the case serves to acknowledge that the committee failed to solve the problem when it last considered complaints about editing related to the Holocaust in Poland about two years ago. That was during Roe’s tenure and he says the committee was distracted by another dispute at the time.
“It can’t be escalated further than it already has in our mechanisms,” Roe said. “The best we can do is what’s currently happening now — just put it through those mechanisms again, and hope that something better will come out on the other side.”
In explaining why the committee must nevertheless take on the case, an arbitrator who goes by Wugapodes commented that the only other choice is to kick the can down the road.
“This will not be an easy issue to resolve, but the committee was not convened to solve easy issues,” Wugapodes wrote, pointing out that the timing is right given the attention and involvement of outside experts and editors. “We can leverage these resources now or wait for this decade-long problem to get still worse.”
By a vote of nine to one on Feb. 13, the committee decided to open the case. The proceedings, which start with an evidence-gathering phase, are expected to last up to six weeks, after which they can decide to ban and restrict offending editors.
Beyond that, an unorthodox last resort option is also available. Wikipedia’s so-called Supreme Court could ask for help from an even higher authority: the Wikimedia Foundation, a nonprofit that owns the encyclopedia. The foundation intervened in 2021 in what some see as a similar scenario of a far-right takeover on the Croatian-language Wikipedia, hiring an outside expert to disentangle the web of obfuscation and banning a set of editors.
Roe said that his tenure on the committee in 2019 and 2020, which featured related complaints about the editing of articles on the Holocaust in Poland, helped lead him to believe that Wikipedia should embrace change, at least when it comes to controversial political topics.
“I would like to see these difficult and politically charged content problems be referred to a new body made up of external experts, and that we don’t insist on doing everything internally among the community volunteers,” Roe said.
But he acknowledged that such a scenario is unlikely to result from the Poland dispute.
“It’s not a popular view and it kind of goes against the general idea of Wikipedia,” he said.
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The post Wikipedia’s ‘Supreme Court’ tackles alleged conspiracy to distort articles on Holocaust appeared first on Jewish Telegraphic Agency.
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Richmond mayor facing resignation calls over posts calling Sydney massacre ‘false flag’
Bay Area Jewish leaders are calling for the resignation of Richmond Mayor Eduardo Martinez after he re-shared multiple LinkedIn posts that called Sunday’s massacre of Jewish people in Sydney an Israeli “false flag attack.”
Martinez, who was elected by the city just north of Berkeley in 2023, also shared posts claiming that “the root cause of antisemitism is the behavior of Israel and Israelis.”
Martinez has since removed the posts from his account and apologized for sharing them “without thinking” — but he did not disavow the false flag conspiracy theory about the attack. He clarified only that “we know that antisemitism was here before the creation of the state of Israel.”
“As I’ve said many times before, we should not conflate Zionism with Judaism,” Martinez wrote on LinkedIn. “They are two separate beliefs.”
He later added, “I want to assure everyone that these postings are my opinions (or my mistakes) and mine only. They are not statements from my office or the city of Richmond. If I make a mistake, that mistake is mine only. Once again, I apologize for posting in haste without full understanding of the posting.”
He did not discuss the attack, which killed 15 people and injured dozens.
The Jewish Community Relations Council of the Bay Area was outraged by Martinez’s online activity and left cold by his apology. It called for his resignation Thursday in a statement posted to JCRC social media.
“These actions reflect a consistent and deeply troubling disregard for the safety and dignity of Jewish people,” the organization wrote on Instagram. “They erode public trust and send a chilling message to Jewish residents that they are neither protected nor respected by their own mayor.”
The local chapter of the Anti-Defamation League, ADL Central Pacific, also condemned the post.
“There’s no excuse for an elected leader to be amplifying warped antisemitic conspiracy theories that seek to blame the victim,” ADL regional director Marc Levine wrote in a statement to J. The Jewish News of Northern California. “The Australian community has already faced enough tragedy over the last few days. We hope Mayor Martinez will reconsider his hurtful words, which have absolutely no place in public discourse.”
The Forward has reached out to Martinez for comment.
Martinez’s LinkedIn posts were the latest in what local leaders say is a slew of antisemitic incidents during the progressive’s tenure. In 2023, just weeks after the Oct. 7 attacks, Martinez
Martinez, a former schoolteacher, posts regularly about the Israeli-Palestinian conflict on LinkedIn, sometimes multiple times per day.
In August, speaking at the People’s Conference for Palestine in Detroit, Martinez likened the Oct. 7 attack to someone snapping after being bullied on the playground, J. reported, adding that whether he supported Hamas was “complicated.”
The post Richmond mayor facing resignation calls over posts calling Sydney massacre ‘false flag’ appeared first on The Forward.
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Mamdani appointee resigns over past antisemitic online posts about ‘money hungry Jews’
(JTA) — New York City Mayor-elect Zohran Mamdani’s pick for a crucial City Hall position resigned on Thursday, shortly after her history of antisemitic posts on X came to light.
Mamdani had announced his appointment of Catherine Almonte Da Costa as director of appointments, responsible for staffing City Hall, on Wednesday. But on Thursday, several posts on X where she peddled age-old antisemitic stereotypes were published by the Judge Street Journal, a Substack about New York City politics.
“Money hungry Jews smh,” Da Costa posted on a now-deleted account on X in January 2011, when she 19 years old.
In another post from June 2012, she wrote, “Far Rockaway train is the Jew train,” appearing to reference the large Jewish communities off the line.
The Judge Street Journal also highlighted posts that suggested an antipathy to white men by Da Costa, who has worked in diversity, equity and inclusion roles in multiple companies.
As a firestorm grew, Da Costa said she would step down.
“I spoke with the mayor-elect this afternoon, apologized, and expressed my deep regret for my past statements,” she said in a statement shared by the Mamdani transition team. “These statements are not indicative of who I am. As the mother of Jewish children, I feel a profound sense of sadness and remorse at the harm these words have caused. As this has become a distraction from the work at hand, I have offered my resignation.”
Mamdani released a statement of his own. “Catherine expressed her deep remorse over her past statements and tendered her resignation, and I accepted,” he said.
The incident came as Mamdani’s election has roiled the city’s Jewish community, with many expressing fear and discomfort over the mayor-elect’s history of anti-Israel rhetoric and policies. He has emphasized that he aims to make the city safe and welcoming for all of its residents, including Jews, and has condemned antisemitic rhetoric and displays since his election.
Still, his transition period has been dotted with tensions, including While Mamdani has made inroads in the city’s Jewish community since election night last month, the appointment of an official with a visible history of antisemitic rhetoric could pose another hurdle for his incoming term.
The New York and New Jersey branch of the Anti-Defamation League, which launched what it is calling a “Mamdani Monitor” following November’s election, called Da Costa’s posts “indefensible” in a post on X.
“We appreciate Da Costa has relationships with members of the Jewish community,” the group tweeted. “But her posts require immediate explanation — not just from Ms. Da Costa, but also from the Mayor-Elect.”
Several Jewish leaders praised Da Costa’s resignation.
The CEO of the Jewish Democratic Council of America, Halie Soifer, welcomed the news of in a statement Thursday evening.
“Glad to see that Catherine Almonte Da Costa has resigned,” said Soifer in a statement. “The views she expressed are unacceptable and intolerable. Especially at a time of rising antisemitism, she had no place in the mayor’s office of the city with the largest Jewish population in the world.”
Sara Forman, executive director of the New York Solidarity Network, which backed Mamdani’s leading opponent in the election, praised “cutting ties” with Da Costa as” the right thing to do.” But Forman speculated that “had she said ‘Zionist’ instead of ‘Jew’ the response from the incoming Mamdani administration and the outcome we just witnessed would likely have been quite different.”
Da Costa’s husband, Ricky Da Costa, is a deputy in the office of Comptroller Brad Lander, Mamdani’s most prominent Jewish backer during the campaign. He is Jewish and posted on X for the first time in more than a year in a half on Thursday afternoon, in response to the criticism of his wife.
“I don’t come back to this awful place much these days but as the Jew who married Cat, I can guarantee she has grown so much since some dumb tweets when she was 19,” he wrote. “Her remorse, like everything else about her, is deeply genuine & she works so hard for a NYC where everyone is safe.”
The post Mamdani appointee resigns over past antisemitic online posts about ‘money hungry Jews’ appeared first on The Forward.
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Belgium Reverses Decision to Cut Federal Security in Antwerp’s Jewish District Amid Community Outcry
Police officers on patrol in the Belgian city of Antwerp. Photo: Reuters / Nicolas Maeterlink
After facing strong opposition from public officials and the local Jewish community over plans to withdraw federal security in Antwerp’s Jewish district, the Belgian government announced it will maintain current security measures, keeping federal police deployed for the time being.
Belgian Interior Minister Bernard Quintin announced on Thursday that federal officers will remain deployed in the district, reversing an earlier government plan to cut the police presence there by roughly half. The reversal followed Quintin’s meeting with representatives of Antwerp’s Jewish community
Avec des représentants de la communauté juive d’#Anvers.
Leur sécurité est une priorité absolue: les dispositifs actuellement en place sont maintenus.
Je souhaite les renforcer par la présence de #militaires et espère que cette mesure pourra aboutir dans les heures à venir. pic.twitter.com/ODKh8sjMZ6
— Bernard Quintin (@BernardQuintin_) December 18, 2025
This latest decision comes just days after a deadly attack on a Hanukkah celebration at Sydney’s Bondi Beach that left 15 dead and at least 40 injured, amid ongoing concerns about threats to Jewish communities worldwide.
On Monday, the Antwerp branch of the far-right political party Vlaams Belang had called for increased protection for Jewish schools and institutions during a city council meeting, Belgian media reported.
The government had originally rejected calls to bolster security, planning instead to withdraw the federal deployment, a move that sparked outrage from city leaders and renewed concern within the Jewish community amid ongoing threats.
Addressing these concerns, Quintin stressed that protecting Jewish sites is a top priority for the government, but emphasized that the federal police presence in Antwerp is not intended as a permanent solution, with local police responsible for maintaining security on the ground.
Antwerp Mayor Els van Doesburg had condemned the government’s earlier decision as “incomprehensible,” warning that the city cannot risk a security gap, especially in the wake of the Bondi Beach attack on Sunday.
“There must be no vacuum in the safety of Antwerp’s Jewish quarter,” Doesburg told Belgian media. “This is something we have to do together. It goes beyond the Antwerp police.”
Since the deadly attack at Brussels’ Jewish Museum in 2014, security measures have been strengthened, with Belgian intelligence consistently warning of elevated threats to Jewish sites.
In response, Antwerp has long maintained a mixed model in which local and federal police share responsibility for their protection.
The federal government has now proposed an alternative plan to deploy military personnel at Jewish community sites in Antwerp to support local police and increase capacity, though a government-wide consensus has yet to be reached.
Jewish community leaders had previously sharply criticized proposals to reduce security, dismissing Quintin’s explanation and denouncing it as a “political decision.”
Ralph Pais, deputy chair of the Jewish Information and Documentation Center (JID), a Belgian nonprofit that combats antisemitism, noted that the planned withdrawal, both in its timing and execution, had heightened concern within the community.
Despite the community’s expectation that authorities would address the issue, Pais had warned that inadequate security could lead to serious problems.
Dus geen 48 uur na de verschrikkelijke aanslag op joden in Australië zet nota bene onze minister van Binnenlandse Zaken @BernardQuintin_ de federale politiebeveiliging in @Stad_Antwerpen stop!
Burgemeester @elsvandoesburg vindt het uiteraard…
— JID (@s_antisemitisme) December 16, 2025
Van Doesburg had called for federal officers to remain in place until a suitable replacement could be established, whether through increased local police staffing or the deployment of military personnel — a request now addressed by the government’s decision to maintain current measures.
The European Jewish Association (EJA) said in a statement that it “welcomed” the move to maintain current federal police levels in Antwerp, noting that the initial plan “caused deep concern within the Jewish community and beyond.”
“This decision follows direct engagement with elected officials and Jewish representatives and sends an important message: the safety of Jewish life is a core responsibility of the state and cannot be subject to uncertainty or gradual erosion,” the EJA said. “The EJA wishes to express its sincere appreciation to [Quintin] for listening carefully to these concerns and for acting decisively to prevent any security vacuum. We also commend MP Michael Freilich, who raised the issue forcefully in Parliament.”