Unfortunately prejudice was found after world war one toward those of the jewish faith. A lot of the misinformed thought the Germans could've won, but were betrayed by jewish people.
A lot of problems were attibuted to the jewish people, and when Hitler, who put Germany back on top economically, pushed the blame the German Nazis went along with it. The Nazis became so powerful, and Germany started becoming succesful so Hitler's ideas about the jews was accepted.