The Death of Klinghoffer, an opera that aims to create sympathy for the terrorist hijackers of the Achille Lauro, returns to the New York Metropolitan Opera tonight. Edward Rothstein, reviewing the piece when it first opened in 1991, had some nice words for the conductor and the singers. But he also found the music “either atmospheric or emotionally elementary” and the message, delivered through a contrastingly “empathetic evocation of the [Palestinian] intifada” and mockery of the terrorists’ Jewish victims, politically rigged and morally repugnant. In Rothstein’s summary:

The work itself turned out to be more about its intended reception than about its subject, more a matter of pitch than substance. Without historical insight, without profound revelation of character, without the advertised symmetry [between Jews and Palestinians], without even a coherent libretto and convincing score, The Death of Klinghoffer becomes simply another monument to an avant-garde that is repeating old political and aesthetic gestures while acting as if it is daringly breaking new ground.

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.