If you’re stupid enough to kill someone else. You deserve to die. No argument needed. If there is enough evidence that proves you are the murderer. You deserve a death penalty. People take things for granted now-a-days. Thinking they can get away with killing innocent people. The everyday families that have to suffer the loss of a loved one due to stupid people wiling to kill in order to prove a point to “the gang” or “the homies”. Well your stupid self deserves death. You get what you give. And if what you give is death. You shall receive.
What you say is all well in theory, but the greyer areas are the problem. People make snap decisions and sometimes make the wrong one, doesn't always mean they should be killed.
Even though I believe some horrific murderers/rapists should probably be put to death, I don't support the death penalty for a few reasons:
A. The justice system is not infallible. Mistakes can, and do happen. At least if someone is in prison you can release them. You can't bring a dead guy back to life.
B. It's obvious that introducing the death penalty doesn't change peoples likelihood of committing crimes. Just look at the murder rates of some of he southern American states that use the death penalty. People don't consider the punishment when they're not even contemplating getting caught.
C. I think it's morally wrong for one human to have society's permission to kill another. Can't justify this one really, I just feel it's detrimental for society to have a system such as this.
Do I think some people should be wiped off the face of the Earth? Yes.
Do I believe such a law could be fairly implemented and enforced? No.