For decades most of the organized Left has fought against Republicans and conservatives more than against the world's greatest evils. During the Cold War, starting in the late 1960s, one heard little if anything from the Left about the evils of Communism or of Communist societies such as the Soviet Union or Communist China. But one heard a great deal about the evils of American anti-Communists; Ronald Reagan was vilified much more than Soviet leader Leonid Brezhnev. But last week, a new line seems to have been crossed. The organized Jewish Left -- i.e., left-wing Jewish organizations that claim to...