The existence of God is neither necessary nor sufficient for a moral code. Or is the only reason you haven't gone on a killing spree because God says not to?
The fact that he hasn't gone on a killing spree is neither here nor there. The question is if he did go on a killing spree for whatever reason, why is that wrong if his prime directive is to do what pleases him and killing pleases him?
I never said it was. My point was that believing in a moral code requires no less faith than believing in God.