Bush and Hilter both shamelessly used the people's fear, and tough times in their nation, to further their agenda. They have also both invaded other nations. Beyond that there's no comparison. Trying to say they are equally bad diminishes Hitler's atrocities and compliments Bush for having atributes which he clearly doesn't possess.

Hitler was evil, pure and simple. Call Bush what you will but he does not possess the evil that Hitler did.

Hitler was intelligent, the classic evil genius. Bush is a dumb fuck who only rose to power because Daddy was a President before him.

See, big difference.