It is salutary to see how swiftly Hitler’s violent antisemitism became reality on the streets as within two months of his accession to the chancellorship in January 1933 the Brown Shirts had launched their campaign of terror against Jews and Jewish shops and institutions. This did not go unnoticed abroad, thanks to courageous reporting by foreign correspondents. An estimated million Americans marched in protest throughout April, while in Britain many letter writers to the Jewish Chronicle demanded a boycott of German goods and there were demonstrations in the East End of London where 100,000 Jews lived. Hitler, of course, took...