Someone can not hate God, and not believe in him. But if there is a god, based on what I see around me, I don't like him very much. But like Samwhore said, many hate the idea of God, or organized religion, but you can't hate what you don't belive even exists.

I on the other hand am agnostic, I simply don't feel I have enough info to support either belief. I'm basically keeping my options open until I get furthur proof one way or the other.

I can still dislike him, it what ever you have it. There are many things to dislike of him. It is actually much harder to reason out the devil, hence to the non-believer, everything good and bad is the result of God (if he does exist). Religion only credits God with the pleasent things and what is found in the Old Testement. I credit him with what the devil is credited for.