To me, being a satanist is all about following my own path, being an individual, not worrying about a God or a higher power. But while I don't worry about following a God, I still believe there is one out there..but Satan is there to pull you away from the "brainwashing" powers of God and religions like Christianity, to keep you an individual.
I don't worship Satan, he's not my Savior, he's just something I believe is there to help me stay me.
This is MY take on the religion, and may not be fully correct, but who cares, religion is diff. for everyone.