Having started his scholarly career as a student of ancient Roman politics, Erich Gruen—now a professor emeritus at the University of California, Berkeley—later shifted his focus to the study of Jews in the Hellenistic and ancient Roman eras. In a retrospective on his scholarship of ancient Jewry, Gruen sums up some of his key conclusions:

I entered [the academic debates concerning ancient Jewry] directly by confronting the widespread notion that societies tended to define themselves by “othering” those unlike them and by demonizing those from whom they wished to distance and distinguish themselves. The classic statement of that approach rang loud and clear in Edward Said’s powerfully influential Orientalism. And it seeped deeply into studies of the ancient world. Negative images, misrepresentations, and stereotypes, it was regularly argued, justified marginalization and exclusion, a tendency to divide the world into the acceptable and the unacceptable, whether Greek and Persian, Roman and barbarian, Jew and Gentile—in short, the invention of the “Other.” . . .

[I] attempted to show that Greeks, Romans, and Jews (whence comes the bulk of our evidence) had far more mixed, nuanced, shifting, and complex opinions about other peoples and did not simply propagate derogatory images to enhance their own self-image. There was more going on than ethnocentrism or xenophobia. [Thus, many ancient] Jewish writers underscored their connectedness [to the Gentiles] rather than their separatism, as in the story [in Genesis of Judah and his daughter-in-law] Tamar and of [the convert and ancestor of King David] Ruth, and in the manipulation of traditions that implied kinship between Jews and Greeks, such as turning Abraham into a forefather of the Spartans or inventing a marriage alliance between Abraham and Heracles, as well as a number of tales that linked Jewish sages to Greek philosophers. These intertwinings, however fictitious, reveal a mindset that did not retreat into isolation and xenophobia.

Nor did Greek and Roman writers view Jews as beyond the pale. They might mock their customs and badly misconstrue their practices. But that was due more to ignorance or dismissal than to animosity or malice. Even the notorious [anti-Jewish] tirade by the Roman historian Tacitus, normally seen as the chief purveyor of [ancient] anti-Semitism, had a very different agenda. Tacitus’ penchant for irony and sardonic reversal twisted the image of the Jews largely to skewer his own countrymen. . . .

If a consistent thread runs through my studies of Jewish history in the context of classical antiquity, it can be found in resistance to the common portrayal of Jews as victims.

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.