Think you're confusing it with the church of Satan.

From the satanic temple website

"Resolutely non-theistic, The Satanic Temple does not endorse supernatural (or “supernormal”) explanations, a position also codified in the tenets which state, Beliefs should conform to one’s best scientific understanding of the world. One should take care never to distort scientific facts to fit one’s beliefs."

Satan is a symbol for them, not an actual diety.