They're just atheists, anon.
Just because they call themselves satanists doesn't mean they ACTUALLY worship Satan. The bad people are only at the top. They're the REAL satanists. They think they're doing something good, anon.
You think the average Laveyan Satanist, (the people I'm comparing to the average Jew), eats children? Just because they don't, does that make their religion automatically good just because they believe that they are good?