Well, I'm Christian, but I've never considered satanists a threat to Christians at all, largely because my understanding about Satan is that he really doesn't care about using satanists for anything. His agenda is to infiltrate the Church and Kingdom of God and corrupt it, making it as ineffective as possible.

He offered Jesus the same opportunity that he will offer "The Anti-Christ" - to give him the kingdoms of the World and the "glory" of them. He wanted Jesus for that roll, not a hell-raising dictator like Hitler or what-have-you. His end-time goal is to fool the World with someone who seems very holy and who has spiritual authority and popularity.

Anyhow, that's my take on it and my opinion. Good post! :)