Bernie Sanders, the front-runner for the Democratic presidential nomination, is a Jewish socialist. One of his major challengers, Michael Bloomberg, is a Jewish billionaire who made his fortune on Wall Street.What’s wrong with this picture?You don’t have to be a Jew or a historian — and I’m both — to know the answer. Across the past century, anti-Semites have reviled Jews as both rapacious capitalists and as revolutionaries against capitalism. That makes no sense, but prejudice rarely does. Add to the mix Donald Trump, who has traded in his own anti-Jewish rhetoric, and you have a formula for ...