depends on the type of satanism. for example Lavey satanism is
about indulgence and eye for eye vengeance. other more traditional
forms might be the standard "devil" and "evil". however, it is
still a religion like christianity, and unless it really teaches
evil that harms others, it has as much footing as other mainstream
religions
oh, i'm an atheist here who found some parts of LaVey's satanic
bible interesting 
