I don't really have a political opinion on the matter and I'm not sure which way I'd sway if it came to a vote, but I think the consequence of death for crimes is unavoidable. Life is brutal and unforgiving, and reciprocation for crimes is expected, especially in emotional creatures. Evolution played a part in the emotions we feel for people we love and like, and we are willing to defend them and want revenge on those who wronged us. It's part of human nature. We're still tribal, we hurt those that hurt us, and we cast out any wrongdoers within our group. Murderers, rapists, ect, know the possible consequences of their actions. I feel no empathy towards them. Do I like the idea of killing killers? Killing in general? No and I see the hypocrisy, but I really don't feel anything towards those that lose their life after committing atrocities, whether it be from someone defending their loved one within their home, or by lethal injection. It's part of life. I wouldn't feel sorry for a dog that died trying to attack the puppy of another dog either.
I think prisoners in for life are a waste of space and resources anyways. What's the point? Rehabilite those we think can make a comeback into society, and get rid of the rest. No one feels sorry for a murderer that gets killed in the heat of the moment, why do people feel so strongly about their death for the same crime at a later date? That person knew that he could be killed for what he was doing, and chose to do it anyways. The blame falls on him. Of course I would rather that "tribal" consequences would still exist. Back in the day if you committed some kind of bad act you would be cast out of that society and group, and you would lose the protection and help of your group and most likely die or be killed. These days it's much to easy to eek out a living, and there's nowhere to boot people to, so the consequences of committing horrible actions aren't as strong. So we have to decide what to do with these people, keep them locked away without any kind of production or value, or put them into the dirt. It's a hard decision.
My big issue with the death penalty is the fact that innocent people wrongly accused of crimes may and do get put to death, and that makes me feel very sad. That's what keeps me from leaning strongly towards support of the death penalty.