How was hitler so successful in convincing people to discriminate against several groups of people ? how did he do it ?

He used the German people's fear and uncertainty from the Germanies loss in the First World War, and then used his persuasive skills and charisma to manipulate there fear and convince them that the Jewish, Gypsies, ect we're what caused Germany to loss the First World War. Even though many Jewish actually fought for Germany in the First World war.

The american civil war