WN’s don’t really believe man was created in God’s image but rather man only exists to serve the state, or at the least they think only White people were created in God’s image. This is why WNs support abortion for non-White people.
Anyway, White Supremacists, in a way share this contempt for Christianity along with hardcore liberals who also see people primarily as objects to serve the state who can be disposed if they’re deemed incongruent with overall plans.
Now, WNs do reference Christianity, but they view it only as something to be exploited to drive people to White Supremacy (ex: WNs and fundamentalists both oppose gays). In fact, Hitler wanted to eliminate Christianity from Germany just as he did Judaism.