This is what the Death Penalty says to people:
"Hey, you should kill people or rape them or hurt them in any way. So we're going to kill these people to show you that killing is wrong. And no, that does NOT makes us hypocrites."
My brother once did a presentation on the death penalty, and told me it costs more to kill someone than to keep them in prison. I have no idea if this is true, but I trust my brother enough to go behind his word.
Besides, I don't know if they have animes and Neko Mimi in heaven.