As for the White nationalist/Whorefronter types who fall for paganism, there are several reasons why they get into that. The number one reason is that they want to be able to do what they want to do without the God of the Bible passing judgment on them for it. They somehow view pagan deities as more permissive to what they want to do. That's why a lot of people get into various forms of paganism.
Another reason, and probably just as important as the first one, is that WN/Whorefronters HATE Jewish people. They hate them so much that they don't want to be involved in anything that could even vaguely be associated with Judaism. They consider Christianity to be too Jewish because Christians honor the Jewish Bible and Christians also consider Jesus to have been Jewish. The fact that rejecting the Bible totally brings them back to a primitive, neolithic religion of worshipping the sun, moon, natural forces, and pagan deities doesn't bother them because they would rather do that than to associate with anything vaguely Jewish. That's how much they hate Jews and Judaism.
These two reasons are really related. They hate Jews because Jews remind them that God exists. Jewish survival in spite of many, many attempts to annihilate Jews as a people is a testament to the fact that God is real. Jewish people represent that just by being alive. That's the root of why they hate Jewish people. They don't want God to exist. They don't want to have to answer for their depravity.