““This introduces one of the most significant differences between Mussolini and Hitler. For most of his career, Mussolini considered anti-Semitism a silly distraction and, later, a necessary sop to his overbearing German patron. Jews could be good socialists or fascists if they thought and behaved like good socialists or fascists. Because Hitler thought explicitly in terms of what we would today call identity politics, Jews were irredeemably Jews, no matter how well they spoke German. His allegiance, like that of all practitioners of identity politics, was to the iron cage of immutable identity.””