Luciferianism, for example, deals with worshiping what the Devil was before becoming the Devil. The worshipers follow what that angel once was, who was God’s right hand man in other words. They follow and practice whatever ideals he had, before he was all corrupted. Although some also worship the corruption aspect. Either way, it’s a form of motivation and inspiration for good. If God wasn’t so conceited, He probbaly wouldn’t have a problem with people worshiping Lucifer.
There are also some beliefs that God is actually evil and the Devil good. I forgot the name. Maybe some deists also worship the Devil, if the latter is presented along with the idea that God made existence and let it to fend on its own.
Although if you ask me, most modern forms of Satanism are used as social shock value, just like Laveyan Satanism. I think there’s an answer in that somewhere…Rebellion, wanting to be different, trying to find one’s place, stuff as such. I’m not entirely sure how much one’s social aspiration relates to truer beliefs though, especially in older times where you got your head cut off for looking at a priest the wrong way.
I was a self proclaimed Satanist in my younger years, mostly derived from Lavayan Satanism, just so I could stand out and be someone. It’s only later that I found out that this set of philosophies is as hypocritical as the Christians they blame of hypocrisy lol, and that which forms most of its basis. Anton has a point indeed, a very good one. We’re not human without what God condemns. But we can’t do what Lavey says we should, either. If I smash the face of everyone who smites me, I’d be in jail fast. I cannot hold my opinion unless it is asked of me, no one can. It’s so weird how different beliefs that are linked together (God and Satan) are adopted for such different reasons. Not speaking for anyone but through my own experience and feelings at the time, but maybe it’s worth a little something for this question.
Maybe it’s like that with other forms of Satanism. On the other hand, when you look at the teachings of The Bible and its severity, God isn’t a very ideal being to follow. Satan does sound a lot more fun, minus the soul eating shit.