Comment by narrator

IMHO, the occult is just pre-modern social psychology and propaganda. How to get people to join your religion and fight, do bad stuff, and die for you is really old technology. Before modern psychology "Spellcasting" was saying something to someone for the effect it would have on them to manipulate their psychology to get them to do the thing you wanted them to do. It was a sort of pre-modern NLP. Christians and people of other Abrahamic faiths co-existed with and did not like these guys and the feeling was generally mutual.