In state-sponsored genocides by the German Reich , millions of people were murdered by Germans during WWII . It made families and friends of the victims anti-German . American General George S. Patton complained that the U.S. policy of denazification following Germany 's surrender harmed American interests and was motivated simply by hatred of the defeated German people . Reprisal action soon took place in Europe . Even the speed of West German recovery following the war was seen as ominous by some who suspected the Germans of planning for World War III . In reality many Nazi criminals were unpunished , eg . Heinz Reinefarth , Wola massacre author . Many Nazis worked for the USA as scientists ( Wernher von Braun ) or intelligence officers ( Reinhard Gehlen )
Wola massacre
Wola massacre
Anti-German sentiment