Hitler did NOTHING to "look innocent", if you said divinely justified, you'd be closer to the point. And if the Germans weren't prodominately Christian this wouldn't have been a tactic of any use. He appealed TO their Christianity as a unifying tool.
And it was far to easy to do that, he understood that racism was inherent in the church, especially the Catholic vocal hatred of Jews. For every racial edict or speech Hitler made you can find it's mirror in the German churchs and Vatican pronouncements before and during Hitlers reign.
Hitler didn't just use the church, he was a product of it, he understood it.
@Klaus
"Hitler, with all his germanic superstition, was more a pagan, I think (I refer to either Germany as a country and the germanic tribes that were not conquered by the Romans)."
Check out the art, paintings, freizes and sculpture of German and European Cathedrals, Pagan concepts are very well represented, Gargoyles, Cherubs etc. It's well documented that these Pagan and Nordic legends were incorporated into the theology and ingrained into European culture. It's not like even todays Christian don't carry loads of other superstitous, non-Biblical beliefs with them.
To say that Hitler had some Pagan beliefs (and some of his Reich-staff even more) doesn't stop him from being a Catholic in any way.