Satanism in its iconography and ceremonial and its philosophy/theology, is a deliberate inverse of, especially, Catholicism. Catholicism just has all the cool stuff that they want the opposite of, everything worth perverting.
I don’t think I have ever heard of “Protestant” Satanists.
I don’t think I have ever heard of “Protestant” Satanists.
Catholics have "Satanists." Protestants have "Luciferians."