I think it might be worth attempting to understand where moral belief comes from. IMO it comes from society, for example the Bible has always reflected the beliefs of it's time. So all forms of moral code are developed within a particular society. But morals come from wanting to better a society, it is a survival method for the entire society. But I think the Boondock Saints said it best:
"Do not rape,
Do not murder,
Do not steal,
These are principals which every man of every faith can embrace"
Hehe, pop-culture references are fun.
-Brad