Actually I had a long discussion with a creationist who hasn't posted to the site for a while. They usually say that the commandment says 'thou shallot murder' which is a huge caveat when compared with 'thou shalt not kill'. In particular who gets to decide whether is is murder or not. Again, the answer is usually the state, which gets us onto the interesting position that God can in effect be overruled ny the state in the event of a disagreement. But also many genocides are state approved, so presumably they don't break the commandment. And this doesn't begin to deal with civil wars when it isn't even clear who the state is