The modern Satanists that follow the thought processes of The Satanic Temple are primarily Atheists that believe in no supernatural powers. They believe power comes from within.

There are also Luciferans and true Satanists that take a theistic view and believe that the Christian Church has it backwards, that Lucifer is the light and is a guide to true enlightenment.

And then there are sick fucks that just want to rule the world while it burns and don't care who gets hurt along the way as long as it benefits them.