I returned home from Wednesday’s anti-Netanyahu demonstration on Capitol Hill in time to watch the Israeli prime minister address a joint session of the U.S. Congress. The vilest thing about the event was not the speech itself, which was predictably bloodthirsty and mendacious, but the reactions of the assembled Congresspeople. Almost all of them stood and cheered lengthily while their invited guest smeared those protesting his appearance in the streets outside the Capitol as pro-Hamas “idiots” who “stand with rapists and murderers,” and whose protests are “paid for by Iran.”