Enemies of Israel have characterized the Balfour Declaration—the centenary of which is tomorrow—as “one nation’s promise to another of the land of a third.” Less hostile observers have pointed to the woe caused by Britain’s later abrogation of it. Dore Gold explains why it still matters:

The Balfour Declaration is important because it recognizes the historical bond of the Jewish people to the Holy Land, a bond which existed long before the declaration. What was significant was its public and formal recognition and its incorporation into international law. . . .

The Balfour Declaration is a tremendously important document because it contains world recognition of the historical rights of the Jewish people to a national home. . . Thus, the [League of Nations’ Palestine] Mandate and the Balfour Declaration, upon which the Mandate was based, did not create Jewish historical rights, but rather recognized a pre-existing right.

The Jewish claim to the Holy Land is based on facts, as we may understand from Chaim Weizmann’s language and choice of words when he explained that it was a major historical event. He called the Balfour Declaration an “act of restitution” and emphatically described it as a “unique act of the world’s moral conscience.” Expressing his deep awareness of historical continuity over millennia, he called it “the righting of a historical wrong” and an “act of justice.” . . .

[Precisely for this reason], the tendency to justify Zionism on the basis of the Holocaust is totally misconceived.

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.