Monotheism. Jealous god and all that; they want to pretend there's only one god in a setting that has many. Even if they have to hurt people in the process. Makes me want to see Grayven slap around an angel or two.Something to think about is that the Silver City doesn't have anything against people speaking to the souls of the dead that live in them. Since Constantine was able to do it all the time. They just seem to have a thing about the servants of pagan gods contacting their dead, probably a noodle incident involved in that.
"You know, I'm told a fellow once managed this with a chainsaw. But I wanted to see -"
<RIIIIP!!>
"-if muscle power could pull it off. Heh, pun."