The figures looked more or less human. And they were engaged in religion. You could tell by the knives (it’s not murder if you do it for a god).
—(Terry Pratchett, Small Gods)
Hate and vengeance are powerful forces. They dull the inhibitions, cloud the thoughts, and drive people to commit unspeakable acts. There are demons that reflect intense human emotion, taking shapes that best reflect the desire and experiences of their victims.