Many Christians are hipocrits about athiests...

Neutral, let me boil it down to you.

"Satanist groups that appeared after the 1960s are widely diverse, but two major trends are Theistic Satanism and Atheistic Satanism. Theistic Satanists venerate Satan as a supernatural deity. In contrast, Atheistic Satanists consider themselves atheists, agnostics, or apatheists and regard Satan as merely symbolic of certain human traits."

That's from the wikipage. All discussion above that can ascribed to your unwillingness to consider that the Satanists you spoke to might not be completely the same as every other Satanist.