I'm not sure German Christians did necessarily see Hitler as their salvation in line with their faith. He did ban both the cross and crucifix from governmental buildings as well as the clergy eventually. He criticized the Catholic church in "Mein Kampf", appointed Rosenburg as "Party Philosopher" who was opposed to the Christian faith, encouraged the SS to be anti-christian to the point of developing their own neo-pagan services for weddings and baptisms, and was quite happy to encourage the HJ to sing songs like:
We follow not Christ, but Horst Wessel,
Away with incense and Holy Water,
The Church can go hang for all we care,
The Swastika brings salvation on Earth.

He was a shrewd political beast though, and realised that to gather support amongst a generally christian population it would be wiser not to make too big a deal of his thoughts on their faith.

I have found increasingly over the years there's a fair amount of revisionism over this subject often, but not always, driven by aetheists. Their formula is simple "Hitler was a Christian, Hitler did bad things, therefore Christianity is a bad thing.". I've also heard the same concerning vegetarianism. I find both misguided at best.

cheers,