Being Explicit: Demonology is Heresy Against Satan

 If you worship the Father of Lies the first commandment is to lie: you have to claim you're not worshipping the Father of Lies.

 If you worship one of Satan's demonic saints, the first thing you need to do is lie: you have to claim they're not a paragon of treacherous evil. 

 Demonologies, such as ""occultism,"" fail the very first commandment, and are severely cursed due to flagrantly dishonouring a divine being. E.g. all the Church of Satan folk get serious Palpatine face. (And by the heavens isn't that a funny thing to poke atheists and other "serious" types with.)

 Perhaps that will change now that, with the death of Satan, it's merely an attempted dishonouring. I suspect the lingering shreds of egregore will still carry out the sentence, however. Further, the worshippers themselves, unless they're so crazy they can't speak coherent sentences, know what they're doing ought to be cursing that which they claim to praise.