As othera have said neither the older LaVey based COS or the Satanic Temple believe in Satan and by the way, most Christians don't either. No one is sacrificing babies or selling souls. Well, unless you take into account all the trauma, abuse and self loathing the Christians have caused over the years.

No one in the Satanic Temple is bilking people of money, preaching hate or being bigots so if anything they're better at being Christians than Christians are.