Jeremy Corbyn, leader of Britain’s Labour Party, is a known anti-Semite, having called Hamas and Hezbollah his “friends,” laying a wreath at the cemetery where Muslim terrorists who murdered Israeli athletes in Munich in 1972 are buried, and regularly compares Israel to Nazi Germany. He also wrote the foreword to the reissued JA Hobson’s 1902 work, “Imperialism: A Study,” in which the author, a Jew-hating racist, blamed the world’s problems on “a small group of international financiers, chiefly German in origin and Jewish in race,” going on to say that the stock exchange, the press and even the liquor trade...