The slickly organised theft of one of the most potent symbols of the Holocaust sent a wave of outrage around the world yesterday. The sign that hung over the gates of Auschwitz extermination camp, where more than a million people died during the Second World War, was stolen in minutes. Polish police suspect that the culprits were either neo-Nazis or acting on behalf of collectors or a group of individuals. The slogan wrought in iron, Arbeit Macht Frei (“Work sets you freeâ€), was the cynical welcome to those entering the camp in the 1940s. One million of the 1.1 million...