At first blush, the suggestion that a Nobel Peace Prize winner would have anything in common with a pack of unabashed, poison-tongued Jew-haters seems preposterous. But Desmond Tutu, the former archbishop of Cape Town, South Africa, who in 1984 won the coveted Nobel award for his campaign against apartheid in that country, is today one of the most celebrated supporters of the “Divest from Israel” movement. Particularly widespread on university campuses across America, this movement routinely offers a high-visibility propaganda forum for some of the most rabid, combative anti-Semites of our time.At its heart, the campus divestment movement aims to...