Well, I wasn't specifically talking about those on death row. Most conservatives (at least the ones who makes themselves visible) think that criminals should be treated like dogs. No rights, no mercy, no compassion, just lock them away and beat them twice a day. This is the wrong approach. A murder is still a human, and as such deserves dignity and human rights. Not to mention a criminal who is not a murder, but has only commited some lesser crime.
Most people (exlcuding psychopaths, and those are pretty rare) do not murder for the fun of it. They're just normal people who find themselves in crappy circumstances or grow up in a ****ed up environment. People are the products of their surroundings.
So, if someone kills once, it is doubtful he will kill again. Killing once does not show that a person is a born killer, or that he is not sorry. It just shows that for whatever reason, he thought it necesarry to kill. Fine, let him serve his time and rejoin society. I think that 10, 20 or 50 years of your life gone is punishment enough, without the extra brutality of prison life. The system is incredibly corrupt, prisoners are treated the same way slaves were 150 years ago.