The left doesn’t oppose anti-Semitism. It opposes the right. It will accuse the right of anti-Semitism when convenient even while its ranks swell with the blackest and ugliest bigotry imaginable. It is rotten with anti-Semitism. It can’t and won’t reject it. It won’t even reject the murder of Jews, the bombing of synagogues and membership in anti-Semitic hate groups when its own heroes are doing it.