Dare You To Move

I thought I was talking to Cindy. And God's the only source of justice who'd consider it just for someone to die to make amends for the murder someone else committed. And unless you subscribe to the theory that children too young to know that what they're doing is wrong are still sinful for doing it, there was some period of time during which the only sin on either Cain's soul or Abel's was committed by Adam and Eve. Which, why?