In theory, I fully believe in capital punishment and could personally be an executioner. In actuality, though, I would proceed with extreme caution because of the possibility of mistaken convictions.
To me, it's not about whether it's good or bad for society, whether it makes murder victims' families feel better, or any similar reasons mentioned in posts above. It's about pure, raw justice - even revenge. I don't think revenge is always wrong.
I am aware of some unspeakably horrible things that have been done in modern times and in the past. I could easily execute the perpertrators of such deeds, and I would want them for punitive reasons to suffer before they die - not in a gruesome way, but I would want them to have time to think about their deeds and anticipate their upcoming executions. For example, I'd like to put them in rooms with huge windows facing the gallows upon which they would be hanged and give them time to anticipate the hanging. And it's not because I'm mean, hard, or sadistic. It's because of my great sense of love and kindness and concern for the welfare and happiness of my fellow creatures, both human and animal. It's because I think life is sacred (not necessarily in a religious sense) and I hate suffering and anyone who unnecesarily causes it. It's because I love justice.
I have done a lot of reading on torture - especially that carried out prior to modern times. It's not because I have a sadistic side to me, but it's because I just can't wrap my head around it; I simply cannot believe that humans could think up such methods and carry them out. I also just cannot believe that living creatures have had to endure such heinous things. I would actually like to execute torturers.
I happened a couple of years ago to stumble upon a video of a man who was in a pen with some kind of raccoon-looking creatures, maybe a little larger and longer than raccoons common in the U.S. He was beating them drunk with small canes. When they could no longer walk, he would hang them by one foot on what looked like a clothes line. He then proceeded, while they were alive, to skin them. He started at their feet making cuts. He then peeled the skin off in one piece - from the feet all the way down and off the head. I couldn't stand to watch it, so I put my hands over my eyes and peeked between my fingers. I saw one of the animals who had been skinned. I saw muscle and other tissue; his skin was completely gone. As he was hanging upside down, he turned his head up and pitifully looked at his body, as if to try to figure out what was going on. It was worse than anything I've ever seen in any horror movie.
My wife walked in the room and saw the look on my face and immediately said "what's wrong?" I just shook my head and couldn't explain. It was a mix of different emotions - rage and fury mixed with horror and shock and and intense desire to help that poor creature. There was also a burning desire for justice and revenge. I am horrified now as I think about it (and the fact that I'm sure it goes on regularly). I would find great satisfaction in executing the SOB who did that.
Mikado: Nonone who does such awful thing can be anything other than ill, I'm not saying they are insane, but there is something fundamentally wrong with them.
I don't think you should make such a bold, unfounded statement. Such a statement should be backed up by a lot of scientific research. So are you saying that all humans are fundamentally, inherently good and incapable of inflicting extreme evil on others? I guess you are since you say that 'no one who does such an awful thing can be anything other than ill'. Can't some people just be plain out mean, heinous, sadistic, cruel? I think so, but I'm not going to be dogmatic because I don't know for sure. Yeah, I believe "there is somthing fundamentally wrong with them" - they're mean as hell.
If you came home one day and found that your children had each been slowly tortured to death in a different way, your cat had been slowly cooked in a microwave oven, and your dog had been slowly boiled alive, and the perpatrators were caught, would you want them executed? I would even if they were declared to be insane. I don't see how any who could do such a thing could ever be happy. Call it euthenasia if you want, but they should be executed. Nothing capable of that should be allowed to live in my opinion.
I might change my mind later, but the above is how I feel now. And again, it's because I can't stand suffering and I want all causes of it removed.
P.S. When Sadam Hussein was hanged, I actually felt a little sorry for him, but then I thought about just the little bit of suffering that he caused that I'm aware of, and I found myself glad that he was hanged and that he had time to contemplate the fact that he was going to be.