Without blaspheming our Lord's name, I must admit that Satanism is quite an interesting faith/philosophy (depending on how you look at it). Basically adherants of Satanism have sympathy towards Lucifer (also known as Satan or the Devil) for having been cast into hell after trying to usurp God's throne.
Satanists generally resent God's position, they see Him as an autocrat and megalomaniac. This is why Satanism may be interpreted as a form of libertarianism in which no individual (God in this case) can impose their will on you...that in reality you are your own master. They sympathise with Satan for having tried to change the
status quo, and see Christians as blind followers. This was shown in the book ''Paradise Lost.''
Of course I completely and utterly resent this view but I understand what you're envisioning. Still...I would advise you against using using the term Satanism. Had he been a libertarian, there would be no sin in the world and everything would be fine. The fact of the matter is that Satan is the epitome of evil, he is the n.1 aggressor. He caused sin in the first place by tempting Adam and Eve.
However indeed, as a Satanist, you would regard some parts of the Bible as propaganda made by God. Thus, like I do with any other world religion,
let's agree to disagree. You believe in a different god and devil from me, you are part of your own religion and it would be in our best interests to have mutual respect at this point