Analysis of the Bible and other texts suggesting that, amongst other things, "love thy neighbour" refers only to fellow Israelites; killing heathens -- out-group members -- is fine.
He's no better than those people who pretend they're hardcore Christians when they're really preaching Satan Triumphant. I mean the ones who think that after years and years of weekly church services, with hymn-singing and Bible-reading, the least little exposure to some kind of encoded Satanic reference--seeing pictures of rainbows or Ganesha, or taking in the afternoon matinee of the latest Harry Potter movie, or hearing a rock song with muddled lyrics they can't make out anyway--is tantamount to throwing open the door to Satan.
What they're saying is that Satan is much more powerful than God, and that nobody who was even glancingly acquainted with Satanism would ever want to stick with Christianity. They might as well don the robes and start sacrificing goats, because they believe in the mighty power of Satan as much as any declared Satanist out there.