Jews hating Jews has a long history — going as far back as the Bible.

But medieval times made a real art of it. The psychology of these apostates is fascinating, but also so relevant today. Some felt rejected by their Jewish communities over theological issues. Others simply preferred to join the majority (which in that case, meant the dominant religion).

This was done either for financial gain, inducements or simply to escape the  pressure and oppression of being part of a reviled minority.

In the modern era, the opportunity to abandon religion altogether was an attractive intellectual option. Many Jews reacted to the Holocaust by hiding their Jewish identity. You do not need me to give examples of the many well-known ex-Jews or Jews who side with our enemies today.

Two of the major names who stand out in Medieval Jewry were Nicholas Donin and Pablo Christiani.

Donin was a Jewish convert to Christianity in early 13th-century Paris. He was known for his role in the 1240 Disputation of Paris, which resulted in a decree for the public burning of huge numbers of copies of the Talmud and the expulsion of Jews. Latin sources referred to him as “Repellus,” which might have been the Latin name of his native La Rochelle. But also refer to what a repellent character he was.

Donin was excommunicated from the Ghetto of Paris by the famous (to Talmudic scholars) Rabbi Yechiel of Paris, because Donin had rejected the authority of the Talmud along with rabbinic traditions.

After ten years of living in excommunication, Donin was baptized into the Catholic Church and joined the Franciscan order.

In 1238 Donin went to Rome to denounce the Talmud to the Pope as offensive to Christianity. Thirty-five articles against the Talmud were drawn up, which Donin claimed attacked the Virginity of Mary and the divinity of Jesus — which is a point of contention and debate.

Nevertheless, the Pope was persuaded that the accusations were true, and the authorities were ordered to seize all copies of the Talmud and deposit them with the Dominicans and Franciscans. This order was generally ignored, except in France, where — in 1240 — the Jews were compelled to hand over their Talmuds and four of the most distinguished rabbis of France had to answer Donin in a public debate. The rabbis were forbidden from denying the holiness of Jesus or Mary, as well as disputing any other central Christian doctrine, and Donin was declared victorious. Louis IX condemned the Talmud to be burned and in 1242, 24 carriage loads (ten to twelve-thousand volumes) were burnt in public in Paris.

Donin was rewarded with promotion and a pension. King Louis was made a saint.

The other  fierce turncoat was a Sephardi Jew, Saul — the son of Joshua. He was born in Spain sometime in the 13th century. He married a Jewish woman and fathered children with her. After he converted to Christianity, he took his children from his wife and converted them too. He then joined the Dominicans as a friar and called himself  Pablo Christiani.

He followed Donin’s lead in attempting to ban the Talmud. He is known above all to this day for his role in the famous 1263 Disputation of Barcelona. A favorite schoolteacher of mine, Hyam Maccoby, wrote a book about it which was adapted into a BBC drama.

Christiani’s failure to convert anybody during the Disputation did not, however, discourage him. He went on missionary journeys, and compelled Jews everywhere to listen to his speeches and answer his questions, both in synagogues and wherever else he pleased. He even required his audiences to defray the expenses of his missions.

Christiani did not meet with the success that he had expected. In 1264, he went to Pope Clement IV to denounce the Talmud, just like Donin. The Pope then commanded King James to appoint a commission that consisted of Christiani and others to act as censors of the Talmud. Christiani and the rest of the commission redacted all passages that they deemed were hostile to Christianity. As a result, The Talmud of Christian countries were censored. The original texts were only preserved under Islam.

Five years later, Christiani went further than this campaign against the Talmud, and interceded with King Louis IX of France  to enforce an edict that required Jews to wear badges that would single them out as Jews. He did not give up until his dying breath. There is no record of how many Jews he might have converted.

We are often our own worst enemies, seeking to find favor with majority fashions or ideologies — while at the same time, we face campaigns from the outside to denigrate and disenfranchise Jews. If there is not one excuse, our enemies will always find another. And yet this state has been the norm for thousands of years, and our survival nevertheless should give us hope.

The author is a writer and rabbi, currently living in New York.

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