Trump’s surreal chumminess with Russia and his refusal to reaffirm NATO’s mutual defense clause in Article 5 in his big speech in Brussels is straining the Western alliance, but Corbyn is almost as hostile to transatlanticism as French far-right populist Marine Le Pen, who wants to withdraw from NATO entirely. “NATO belligerence threatens us all,” he wrote in an article for The Morning Star in 2014, a newspaper founded by the Communist Party of Great Britain. He has said that NATO should have been dissolved in 1990, and that it should pull back from the Baltic border with Russia.

All this seems motivated, at least in part, by extreme pacifism and anti-imperialism rather than sympathy for dictators and terrorists, per se. Acknowledging that the likes of Milosevic, Qaddafi, Hezbollah, and so on, are as dangerous as their Western enemies claim bolsters the case for war against them, which Corbyn, as a leader of the U.K.’s Stop the War Coalition, cannot abide.

But none of that explains Corbyn’s enabling of anti-Semitism within his own party. In a report last fall, parliament’s Home Affairs Committee determined that the Labour Party under Corbyn has become a safe space for “those with vile attitudes towards” Jews. “The failure of the Labour Party,” the report said, “consistently and effectively to deal with anti-Semitic incidents in recent years risks lending force to allegations that elements of the Labour movement are institutionally anti-Semitic.”

Hate crimes against Jews, meanwhile, surged a staggering 60 percent in London last year and they’re up an additional 11 percent in the first six months of this year. Jewish members of parliament routinely receive death threats from self-described Corbyn supporters. One of them, Ruth Smeeth, a member of his own party, said she has saved more than 25,000 anti-Semitic emails from his partisans.

In a survey by the Jewish Chronicle from late May, 77 percent of British Jewish voters said they planned to vote for the Tories in the recent election. Britain’s Jews are not naturally conservative, but they view the Labour Party as dangerous.

Corbyn’s record on these matters does not acquit him well. He has defended a mural in London with anti-Semitic undertones, consorted with a Holocaust-denying outfit for more than ten years, and laid a wreath on the grave of a Palestinian terrorist directly involved with the murder of nine Israeli athletes at the Munich Olympics in 1972.

In their endorsement of Corbyn, the editors of The Guardian expressed their wish for “a different, fairer, better and more decent Britain—one that is less divided and more socially just; one that is more hopeful and less fearful.” And yet, they still saw fit to back Corbyn, despite his garish and (under normal conditions) disqualifying flaws because they prefer his policies to the other party’s.