The German people didn't suddenly become evil in 1931, nor did they suddenly become good in 1946. They were perfectly ordinary people who were complicit or active in perpetrating awful atrocities. It happened there and it could happen here. There are people in your life who would, in the wrong circumstances, be perfectly capable of kicking people into cattle cars or gas chambers. They're not psychopaths or monsters, they're just people who do what they're told. That's the awful reality; blaming some aspect of the German character is an easy get-out from confronting that awfulness.
One could even argue that it did indeed happened "here". Take a look at recent Iraq invasion under President Bush. Least at least 8 years, at cost of 150-650 thousands (!!) of lives lost, about 110,000 civilians included... and what happened other than few street riots and march under White House? Nothing! Absolutely nothing! Average American family continues to live average american life and even as we still don't know why this war was started, life goes on :(
No, they were part of an "superior race" culture both before 1931 and after 1946.
(Not to mention their role in WWI as well).
It went much further than skin color differences, my own ancestors in the Western part of France, were called "animals like people" by Parisian politicians during the 19th century.
[0] https://en.wikipedia.org/wiki/Jules_Ferry#Colonial_expansion
"In the nineteenth century, the white man made true men of black people ; in the twentieth century, Europe will make a world of Africa."
http://www.imagesetmemoires.com/doc/Articles/B29paulhachugo....
Some Nazi ideologues were negative towards Christianity, but in general the system were positive towards "German Christianity".
Not at the level of the Jew, but Christian organisations were suppressed and many priests were deported in camps.
See https://en.wikipedia.org/wiki/Nazi_persecution_of_the_Cathol...