To those who say 'we're ridding the world of evil!!' I have to ask why? My personal ethical and moral opposition to the death penalty aside, I have to ask why. Why the death penalty when he'll never ever get out of that prison in Colorado to hurt someone ever gain. What does this seek to achieve other than creating a martyr to be held in high regard. You're giving him the short end of the stick.
I won't get into a huge debate because this is one of the few political issues where I form my opinion largely with my "gut" more than with cold, hard logic, but I will at least give you the courtesy of a response: there are certain people who have so disrespected others' lives that I think they need to lose the very thing they took. I know, I know, the prison might be worse than death, he'll likely never escape and it really doesn't do anyone "any good" to execute him ... but I do not think he deserves to even inhale another breath or have another thought; I don't think he deserves one more second of being conscious or sentient.
I'm sure that sounds ridiculous to many, but that's how I feel.
The bolded part is basically an admission that you just want the death penalty implemented to satisfy your own bloodlust. You do realize that, right?