The way I see it, Hitler didn't like the Jews because:
1) Germany was in a horrible situation. They had huge debts from WWI that needed to be payed off.
2) They needed a scape goat.
Now, if most of your country is poor, but one group (the Jews) is always well off financially because of how they are brought up, who would you want to blame. If you are poor, whose fault is it in your mind? The rich. So, if he takes the money from the rich, and gives it to the poor, of course everyone is going to like him. But, then Hitler went crazy, and decided to kill them off instead of kick them out.
I am in no way defending him, because what he did was sure as hell wrong. The way he did it though, is pure genius.