So far you haven't given us any reason to choose your particular interpretation of religion above others that may disagree. How do you determine if you'r getting morally legitimate commands from whoever is telling you what to do? How do you distinguish the prophet from the deluded? What if your religion tells you to sacrifice your children? How would you know this is wrong? (If you actually believe it wrong.)
I hold one principle from God--in terms of what I need to argue with. We are all of God, and thus I cannot kill or harm you or do anything to you because your rights don't come from me--they come from God.
Now, if someone hurts someone else or acts in a way that is completely detrimental to the social order, they can be removed from society. A country is a culture--shared values and norms, and people who violate those norms must be removed from the culture. But IMHO, not killed. I know a lot of FReepers may disagree with me on the death penalty, but I'm a consistent pro-lifer.