While many, if not most, histories of anti-Semitism begin with early Christian attacks on Judaism, the pseudonymous Dr. Dark Age argues that key tropes of modern anti-Jewish prejudice can be found in the works of such Roman intellectuals as Cicero and Tacitus:

[In his Pro Flacco], Cicero uses an important phrase to describe the Jewish religion: barbara superstitio. This phrase does not translate into “barbarian superstition” as easily as you might think. To understand the insult, you have to grasp its opposite: the ancient Roman concept of pietas. Pietas is a more complex concept than our modern religious idea of “piety”; it required duty and loyalty to the gods, to family, and perhaps most of all, to Rome itself.

Rome’s commitment to its deities . . . was inextricable from Roman patriotic duty. Thus, superstitio was considered not just sacrilegious, but specifically anti-Roman; it made a person an enemy of the state. Meanwhile, barbarus, taken from the Greek barbaros, meant “foreign,” though it could carry connotations of the primitive. Thus the phrase barbara superstitio, when attached to the Jewish religion, renders both the faith and its followers unpatriotic, sacrilegious, backward, and alien.

Cicero’s anti-Jewish views . . . were unusual for Romans at first. . . . A century later, when Rome besieged Judea, the seeds Cicero planted flourished into a full, and poisonous, propaganda campaign. . . .

Tacitus [writing at the time of the Jewish Revolt in 70 CE], doesn’t just demonize the Jews for rejecting Roman religion; . . . his screed against the Jewish people resounds with some painfully familiar anti-Semitic stereotypes: Jews are wealthy; . . . Jews are cliquish and perverse; . .  . Jews are out-breeding “real” Romans; . . . Jews practice sacrilegious rituals. . . . The mythology he creates around the Jewish people paints them as perpetual corrupters, luring people away from their religions, their families, and their patriotic duties on purpose, as though Jews had a singular devotion to destroying all civilizations but their own.

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.