Since Satan isn’t real, we’ve never much cared whether media depict him as “good” or “evil”; not like he’s going to mind. But that may change.
What interests me is less how the devil got horns so much as why. What exactly are they for? The answer I’ve recently come to is: They help.
The face of Modern Satanism is most often as an adversary. But it’s the nature of words, ideas, people, and, yes, religions, to rarely be just one thing.