Should and Killer Be Murdered?

This question brings me back to the question i asked in class last week. I ask if God looks at killing by execution as a violation of one of the 10 commandments that say thou shall not kill. Ludicrous and immoral is the way that the action of murder is looked at so why shouldn't the person who killed be punished? I don't necessaraly disagree with the solution of execution but I don't understand how to look at it from a religious point of view. I do believe that if a person has the courage to kill some one than they should know that their soul is already condemed to hell, so its like they're already dead. As far as cruel and unusual punishment goes, it was cruel and unusual for innocent people to have to die so i think that people on the death penalty are getting exactly what they deserve (if they actually comitted the crime). Execution is the courts way of dealing with it for the people sake. The people who want justice to be served now not on judgement day(if they believe in this). But in my opinion, in God's eyes its already taking care of.