I have been stationed in Germany twice, both times during the cold war pre 1999. I have personally seen what remains of some of the death camps. I have spoken with Germans who where anywhere from 10 years old to twenty somethings during the height of Hitler's rein.
This is what I gather: 1. The politics of the Natzi party did not represent all of the German peoples beliefs.
2. The "final solution" was motivated by some men who actually believed that the targeted races where subhuman and a liability. Others simply used the mechanism of racism as a way of galvinizing the support of the masses and controlling the rest with fear.
3. The policies of the Natzi party where implimented very quickley and were very efficient. We are really lucky Hitler was a addict and not making good decisions.
4. Those that Believed in the Reich went along. Those that did not, keep they're mouths shut. And those that did not were shot.
Natzis took the guise of Christianity to appeal to the masses, in that they believed as did the KKK in the USA, God has chosen them as the super race.
Some of the writings of Fredrich Neitzche were subverted to support they're "Will to power" regardless of the fact that Neitzche was anti-Christian.
So no I do not think we can blame the Christians for the Natzis. Any more than we can blame the Devil for Hitler.
"One is punished most for ones virtues" Fredrick Neitzche