First, some quick reading that many of you might agree with or find it hard to argue against:

"The God of the Old Testament is arguably the most unpleasant character in all fiction: jealous and proud of it; a petty, unjust, unforgiving control-freak; a vindictive, bloodthirsty ethnic cleanser; a misogynistic, homophobic, racist, infanticidal, genocidal, filicidal, pestilential, megalomaniacal, sadomasochistic, capriciously malevolent bully." - Richard Dawkins

I am in agreement with this statement. With that being said, what is Satan? It seems like our society gets more backwards by the day.

Your question is answered in entirety within the first 50 pages of the Satanic Bible.