I am not drawing links anywhere really, the Church of Satan has already stated this and has been stating this since it started in the 1960s. If you don't believe me you can email them yourself and ask them whether or not Satanism is an Atheist "religion," or philosophy.
You are linking Satanism, which is an albeit bizarre form of deism, to atheism. Yet there are both theistic and atheistic forms of Satanism; it would be a fallacy to claim there is only the one.
http://en.wikipedia.org/wiki/Satanism
You mention both in the post below, but emphasize only the one thereafter.
From what I understand of Satanism, it's an Atheist "religion," and or philosophy, thus I think for the sake simplicity, that should do fine, no? Or are you talking about those reverse Christians?