Currently on display at the New-York Historical Society is a tiny diary composed by Luis de Carvajal the Younger, a Spanish-born crypto-Jew who settled in Mexico as a teenager. The diary was stolen from the Mexican National Archives in 1932, resurfaced in late 2015, and was purchased by an American Jewish philanthropist who has restored it to the Mexican government following an agreement first to allow it to be exhibited in New York. Joseph Berger writes:

De Carvajal, a trader, was arrested [by the Mexican Inquisition] around 1590 as a proselytizing Jew and, while in prison, began writing a sometimes messianic memoir . . . on pages roughly four inches by three inches. In it, he called himself Joseph Lumbroso—Joseph the Enlightened. [The surname Lumbroso was used by his relatives in Salonika, who practiced Judaism openly.] It begins, “Saved from terrible dangers by the Lord, I, Joseph Lumbroso of the Hebrew nation and of the pilgrims to the West Indies, in appreciation of the mercies received from the hands of the Highest, address myself to all who believe in the Holy of Holies and who hope for great mercies.”

The memoir tells how he learned from his father that he was Jewish, circumcised himself with an old pair of scissors, secretly embraced the faith, and persuaded siblings to embrace it.

He was freed for a time—possibly so that the authorities could track his contacts with other secret Jews—and finished his autobiography, stitching it together with a set of prayers, the Ten Commandments, and the thirteen principles of the Jewish philosopher Maimonides. Scholars believe he made it miniature so he could conceal it inside a coat or pocket. In 1596, after having been found guilty again of observing Jewish practices, he was burned at the stake. He was thirty years old.

Two extraordinary events demonstrate something important about Israel’s most fervent adversaries. One was a speech given at something called The People’s Forum (funded generously by Goldman Sachs), which stated, “When the state of Israel is finally destroyed and erased from history, that will be the single most important blow we can give to destroying capitalism and imperialism.”

The suggestion that this tiny state is the linchpin of a global, centuries-old phenomenon like capitalism goes well beyond anything resembling rational criticism. Even if Israel were guilty of genocide, apartheid, and oppression—which of course it is not—it would not follow that its destruction would help end capitalism or imperialism.

The other was an anti-Israel protest that took place in front of New York City’s Memorial Sloan Kettering Cancer Center, deemed “complicit” in Israel’s evils. At organizers’ urging, participants shouted their slogans at kids in the cancer ward, who were watching from the windows. Given Hamas’s indifference toward the lives of Gazan children, such callousness toward non-Palestinian children from Hamas’s Western allies shouldn’t be surprising. The protest—like the abovementioned speech—deliberately conveyed the message that Israel is the ultimate evil and its destruction the ultimate good, cancer patients be damned.

The fact that Israel’s adversaries are almost comically perverse does not mean that they can be dismissed. If its allies fail to understand the obsessive and irrational hatred that it faces, they cannot effectively help it defend itself.