Hitler was more than a terrible Christian. He wasn't a Christian at all. He hated Christianity and all that it represented.<quoted text>Just because Hitler wasn't an exemplary Christian doesn't mean he wasn't a Christian. History is littered with examples of this.
All you're doing is illustrating that Hitler was a megalomaniac and crappy Christian assisted by many other bad Christians that led an entire country of "good" Christians to do terrible things, or sit by and do little or nothing to stop him.
The deity belief/morals supposedly instilled by that belief did them no good whatsoever.
He used the gullibility of the German people to advance his position in power. That's as close to being a Christian as he ever was.