Ignorance and subservience is a key point of Christianity, and if you can stomach interacting with them long enough more will say it out loud than you’d think, especially anti vaxxers and other super right dinguses -
it boils down into “something something gods will,” science and knowledge are sinful, our poking around in the ways of the universe are the cause of all the ills in the world, and we should return to a time when all our information is disseminated exclusively by religious leaders.
Thats why, while there are of course more fantastical/“biblical” bands, a lot of black metal is actually more humanist and pro knowledge, pro living, pro freedom. Darkness, the left hand path, etc are just metaphors for rejecting blind faith and obedience.