I'm guessing he thought it was all about money?
Another possible theory - he thought that the Jews thought that the Nordic race was a threat to them so they tried to bring it down.
Edit - to be clear, this question is trying to understand Hitler and the Nazis perspective. That they were wrong has been well established and is not a matter of debate.
Edit 2 - What I'm trying to figure out is hitlers thought process. The Nazis were obviously wrong, they said that 'Every great creation, idea, and artistic expression on this planet were brought forth by real man.' and that Jews aren't 'real man'. What about Einstein who invented the most beautiful theory in all of science? What about the numerous other Jewish scientists, mathmeticians, engineers, and nobel prize laureates? But more to the point, his 'ideology' was based on pseudoscience that has been proven to be wrong. Also based on consipiracy theories that aren't true.