It may have been a religious threat but that is not an existential threat. What do you think happens if suppose most Germans stopped believing in those fairy tales? Do they combust and die? Capitalism literally has no use for religion and nationalism. They are completely out of scope of capitalism, it is at best neutral about them, and in practice religion and nationalism are a hindrance to practicing free trade.
Of course nazis hated commies just as nazis hated any other alternative source of power, but that was hardly their main animating reason for the genocides. I don't need any "brainwashing" to know what nazis openly and proudly said about Jews and Slavs. Or what are you going to say, Poles were also "commies" which is why Germany attacked them? I think the nazi motivation part of your shtick is so beyond mentally ill it's not even worth bothering with.