An Israeli sociologist recently wondered why many Israeli and American Jews have not been more troubled by the anti-Semitism emerging from some of Donald Trump’s supporters. Evelyn Gordon, dismissing the scholar’s use of “the lazy leftist’s favorite tactic of stigmatizing . . . opponents as racist ultra-nationalists,” proffers some answers of her own:

Throughout the Muslim world, Nazi-style anti-Semitism is both rampant and government-sponsored. State-owned media, state-appointed clerics, and government officials all spew it day after day. . . .

Moreover, whereas anti-Semitic Trump supporters are armed mainly with Twitter and spray paint, Middle Eastern anti-Semites, even assuming Iran never gets nukes, are already armed with hundreds of thousands of state-of-the-art missiles, along with suicide bombers, stabbers, car-rammers, etc. Terrorist quasi-states like Hizballah and Hamas have used their weaponry to target Jews directly, and not just in Israel (remember the AMIA bombing [in Buenos Aires]?), while countries like Iran have so far preferred to do so indirectly, by funneling arms and cash to terrorists. Either way, the combination of high-tech weaponry with Nazi-style anti-Semitism constitutes a clear and present danger to millions of Jewish lives, one far greater than the danger posed by even the most noxious Trump fans.

So if your goal is to protect the maximum number of Jewish lives, your top priority is arguably electing a U.S. president who will provide strong backing for Israeli self-defense and strong opposition to murderous Muslim regimes. It should not be to support an American government that will, say, stop arms shipments to Israel in the middle of a war, help turn Iran into the Mideast’s dominant power, or reward Palestinian incitement and terror by blaming the stalemated peace process on Israel—all things Barack Obama actually did.

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.