User blog comment:IamJakuhoRaikoben/Chapter 353: Exorcism, Review./@comment-4449950-20130928030704/@comment-7418318-20130928135851

Since Dragon Slayer magic works on things that are not Dragons and God Slayer magic works on things that aren't gods, I don't see a reason why Demon Slayer magic should only work on Demons and nothing else.