The repetition of racist stereotypes can be used to justify actions that would normally be unimaginable, as was the case with Germany during World War Two. Hitler's anti-Semitism could never have precipitated the Holocaust if Germans didn't already have a long history of anti-Semitic beliefs and actions. The repetition of negative racial stereotypes about Jews and other so-called "undesirables" ultimately propelled ordinary Germans to systematically kill millions of innocent men, women and children.