Going back to the original question of the thread (which I find very interesting):
The Devil, Satan, Lucifer, evilness are not all the same thing, or so I've heard. Satan was one of the angels cast down to earth for punishment and for other purposes which I will get to later. Lucifer was another angel who like Satan rebelled, but was sent to hell. As for the devil, I suppose that is the title given to both Satan and Lucifer because people think that they are one in the same.
By the way, if you ask me where this is coming from, I'll just say a devine penguin told me.
As for God and the Devil from my point of view...Hell is hell and they don't like God, but evil is something completely independant of Satan and Lucifer. I am coming to believe that Satan was sent to earth rather than hell to learn a lesson and not so much to torment us poor little human folk. After all, why would someone as loving as God put a snake in a baby's crib if he didn't think there would be some benefit? My point is, I think Satan was put on earth for two reasons. Punishment: he's got to be surrounded by the things he hates most. Redemption: if God has the infinite faith in us as he asks of us to have for him, why not let Satan see just how worthy we are firsthand? In the book of Job, the whole story is God proving the worth humans to the devil. God is a generally nice guy who wants all the best for his children. So, since God and Satan got along so well before that whole rebellion thing, God decided to teach both us humans and Satan a little bit about how things work in His kingdom by sticking the two of us together until we finally get along. (How's that for a long sentence? Ha!)
Oh, and Huwy, George Dubbya isn't the devil. I'm startin to think that I am though...