The 8th Amendment reminds us that we’re the good guys, and we don’t torture people to death even if they deserve it.
Much as I might want (being the fallen sinner that I am) to inflict some clever and exceptionally painful death on this fellow, torturing people to death is inhuman and unGodly. It shows a callous disrespect for God's creation of human life. It attempts to usurp God's position as the ultimate arbiter of justice. It appeals to our basest instinct.
Respect for human life does, IMO, demand the ultimate penalty of death for some crimes. It also demands that the penalty be carried out efficiently, and without gratuitous infliction of pain. Torture is bad for the torturer's soul.
I do agree.