"Ush made at speech once about how "natural" doesn't apply to us, or lot of the things we do."
Darn right! Anyone who believes that 'Natural' automatically means 'Right' has lived their life with their eyes closed.
But... why the heck should worshipping Satan be in any way explainable? Let's face it, whether real or imagined, Satan is the personification of all that is evil. If you worship him but then try and make out that what you do isn't so bad, I cannot help thinking you are worshipping the wrong concept, or at least using the wrong name for what you DO worship.
But there is no point getting into a "If God is good and powerful why do bad things happen?" argument, not only because that is an argument that belongs in the Nursery (it is square one of the religious debate book and has been done to death, and too many people say it as if that is the end of the matter), but also because it can cause a storm which brings us right back as to why religious debates are so frowned upon around here.