Back several years ago when I was active on some atheist forums, there was a user that was peddling the second point about the Nazis being primarily motivated by Christianity. This was a forum full of atheists replete with negative feelings towards Christianity, but not a single one of them agreed with his contention.
The user in question was so enraged by his argument being rejected by all the other members that he went on a week long rage tantrum where he accused basically the entire forum of being secret Christians and then left the community.
That reaction is refreshing at least (also amusing lol.) I've heard the Horus nonsense gets a negative reaction in most places now as well, but that doesn't mean it's gone away.