Yeah, he's definitely "evil neutral". He uses Islam when it benefits him, but I doubt he uses it for any sort of moral or ethical compass. Just when it looks good, or when he can use it to his own ends. If he weren't so "bad", I'd probably just see him as a lapsed Muslim who follows some of it for cultural reasons, but not because of a sense of faith.
Of course, a big clue that he was going to be evil (even before he showed much through his actions) was the fact Denise is attracted to him. She's got a thing for OTT evil nutters, apparently.