Analyzing the recent bloody attacks on Brussels, Soeren Kern discusses some of the factors that have made Belgium a major hub for Islamist terrorist organizations:

Belgium’s radical-Islam problem originated in the 1960s, when Belgian authorities encouraged mass migration from Turkey and Morocco as a source of cheap labor. These migrants were later followed by [others] from Egypt and Libya.

The factories eventually closed, but the migrants stayed and planted family roots. Today, most Muslims in Belgium are the third- and fourth-generation offspring of the original migrants. While many Belgian Muslims are integrated into Belgian society, many others are not.

Growing numbers of Belgian Muslims live in marginal districts—isolated ghettos where poverty, unemployment, and crime are rampant. . . . Radical imams aggressively canvass the area in search of shiftless youths to wage jihad against the West. As in other European countries, many Muslims in Belgium are embracing Salafism—a radical form of Islam—and its call to wage violent jihad against all nonbelievers for the sake of Allah. . . .

[F]or the past three decades, Belgium has [also] faced an existential crisis due to growing antagonism between the speakers of Dutch and French. . . . This dysfunction extends to Belgian counter-terrorism [in which there is insufficient cooperation between the two groups within the government]. . . .

The language issue also affects integration. As a Washington Post analysis explains, “Many jobs in Brussels require knowledge of French, Flemish or Dutch, and now sometimes English, too, while most immigrants speak mostly Arabic and some French. That has blocked integration.”

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.