In the 16th and 17th centuries, Jewish converts to Catholicism and their descendants began arriving in Amsterdam from Spain and Portugal and, taking advantage of local religious tolerance, returned to the religion of their forefathers. To facilitate their rediscovery of the Jewish tradition, they opened Biblioteca Ets Haim, which has become the oldest Jewish library in continuous operation:

Ets Haim was founded in 1616 to help the newcomers start living publicly as Jews again. Many had continued to practice their true religion in secret while living outwardly as Christians. Amassing the library allowed them to debate among themselves, after so long, what being Jewish meant.

In 1675, the library moved to the Esnoga, the Portuguese Synagogue complex. . . . The library holds, in total, nearly 30,000 printed works dating back to 1484 and more than 500 manuscripts dating back to 1282. The documents not only represent centuries of Jewish thought and scholarship, but also the community’s everyday life. . . .

In 1889, David Montezinos, the librarian at the time, donated his substantial private library (20,000 books, pamphlets, manuscripts, and illustrations) to Ets Haim after his wife died.

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.