Last week I went to a debate “Is Donald Trump Good for the Jews” with Bret Stephens, Rahm Emmanuel and Jason Greenblatt (Trump exec and 1.0 admin staffer) at the 92nd Street Y, a Jewish cultural organization on the Upper East Side of Manhattan.

In a follow up essay I’ll get into why Rahm Emanuel’s perspective about Trump being bad for the Jews is obsolete, yet popular, in shrinking blue bubbles. Before we get there, for this essay, I’ll show how “Y” movements help explain why there’s widespread left-wing support in North America and Europe for violent Islamism.