I recently learned that Hitler didn't exactly decieve people into hating Jews, but rather used pre-existing beliefs in his favor. People already generally didn't like them, and using them as a scapegoat for more issues helped fuel his campaign. Why did so many people already feel this way?

I'm also curious about why he took certain positions. I find it odd that he was so pro-Aryan and a German nationalist, when he wasn't really either. Did any citizens pick up on him not being Aryan? Did his government or group or whatever try to explain this?

Edit to add another detail. One claim I've heard (though only through media so I don't know if people believe/believed it) is that Jewish people 'killed Jesus'. I don't know, however, if the Nazi party cared strongly about Christianity. I believe I read that Hitler didn't care but Himmler was interested in the occult or something. I also don't know where the claim came from, as the Romans killed Jesus on the cross (if I remember correctly).