The founding fathers and writers of the Constitution were the first practitioners of what became later known as "LaVeyan Satanism". But, some corrupt/greedy British Federalist crooks decided to worm their way back in, and create fake institutions in this country and turned the USA into a police state governed by a fake Federal government, instead. (little known fact. lol)
Atheistic Satanism otherwise know as Atheism but you do all the fun stuff that makes christians mad + your get a kick ass role model known as the man himself, Satan.