It was the cringe felt around the world. This past weekend, the cold-open sketch of “Saturday Night Live” tackled the sensational congressional hearings of December 5, when New York’s Republican congresswoman Elise Stefanik grilled the presidents of MIT, Harvard and UPenn — who all refused to condemn students calling for the genocide of Jews on their campuses. A worthy topic, but a disastrous, embarrassing rendering: “SNL” came out swinging — on the side of antisemitism. The sketch’s target wasn’t the university presidents, who failed so spectacularly at the Capitol Building that Liz Magill of UPenn has already quit and critics...