As anti-Semitism on college campuses rises, the perpetrators often hide behind the claim that they are merely criticizing Israeli policies. Thus, argues Kenneth Marcus, if universities wish to oppose anti-Semitism, they must be able to identify it:

Definitions are especially important for contemporary anti-Semitism, because confusion surrounds the relationship between the hatred of Jews and animosity toward Israel. . . . Good definitions not only educate us about how quickly discourse can slip, even unwittingly, into dark corners, but they also foster legitimate intellectual exchanges by increasing awareness about where lines are drawn. This serves the academic interest in robust debate that is central to a university’s mission.

The State Department provides useful examples to understand when conduct is anti-Semitic. The Department uses the . . . “3D test” [coined by Natan Sharansky]. Actions may generally be identified as anti-Semitic when they demonize Israel, delegitimize Israel, or subject Israel to double standards. . . .

As with any standard, the State Department definition should be used judiciously. . . . To say that an incident is hateful is not necessarily to conclude that it must be banned. In some cases, the First Amendment requires public universities to permit bigoted speech. Even then, however, it is important to recognize this speech for what it is.

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.