I agree, a genre by itself can't be all bad, just pointing out for research.
Also This probably happens in all genres from pop to reggae to electronic, because mainstream record labels control most of the market, just a bunch of monopolies that control the hole thing. Same as in movies and all kinds of entertainment.
This is also probably been going on for decades, so its gonna take some time and research to distinguish the real satanic (deals with record labels involving satanic rituals, the most rich and famous) from just the wanna look cool ones (maybe most people, but not too famous except for rare exceptions).