well no see you misunderstand, this is satanism from the view of classical christianity (i'm definitely using this term wrong, i just think it's funny lol, don't read into it). I.E. satan is "an evil god" which even through classical christianity, is not accurate. But i would really recommend you see what certain christians think of satanism lol.
They lack the mental capacity to properly formulate any other religion, so they just replace jesus/god with satan/devil and call it a day at it's simplest.