Adamah - I thought I made it perfectly clear that God (if he exists) and what people claim about God are two completely different things. And since God didn't talk to me I can't talk for him. You are using the Bible as an authority on God, but remember it was written by people who claim to talk in the name of God. And believing something doesn't make it real. Belief is just an opinion...
Beside that, we are trying to understand thinking of ancient people. The times are different, we are different, our thinking is different, it is nearly impossible to imagine what was going on in their heads. (Good point made by Pyramid God)
P.S. And of course, I'm against slavery of any kind (physical, as well as mental, spiritual, or emotional). And I'm sure the Creator of everything would be too. Why would he want 5 of his children mistreat his other 5 children. If they deserve it, maybe there is something wrong with his parental skills.