That wasn't the question, though. The question, in THAT post, was whether or not the death penalty works as a deterrent. The question of whether or not certain criminals
deserve the death penalty is a separate one.
My own thoughts on these two questions is as follows:
1. The death penalty is NOT a deterrent. Although this is a subjective opinion on my part, it is in part based on study after study after study, many of which can be found here:
http://www.deathpenaltyinfo.org/facts-about-deterrence-and-death-penalty
Also from that site:
A recent survey of the most leading criminologists in the country from found that the overwhelming majority did not believe that the death penalty is a proven deterrent to homicide. Eighty-eight percent of the country’s top criminologists do not believe the death penalty acts as a deterrent to homicide, according to a new study published in the Journal of Criminal Law and Criminology and authored by Professor Michael Radelet, Chair of the Department of Sociology at the University of Colorado-Boulder, and Traci Lacock, also at Boulder.
Similarly, 87% of the expert criminologists believe that abolition of the death penalty would not have any significant effect on murder rates. In addition, 75% of the respondents agree that “debates about the death penalty distract Congress and state legislatures from focusing on real solutions to crime problems.”
The survey relied on questionnaires completed by the most pre-eminent criminologists in the country, including Fellows in the American Society of Criminology; winners of the American Society of Criminology’s prestigious Southerland Award; and recent presidents of the American Society of Criminology. Respondents were not asked for their personal opinion about the death penalty, but instead to answer on the basis of their understandings of the empirical research.
The evidence and opinions on this are so overwhelming that, IMO, if you still believe the death penalty IS a deterrent, the burden of proof is on you.
2. The question of whether or not certain criminals deserve the death penalty is one that I honestly go back and forth on. I think it really is the key question regarding this issue- deterrence is largely irrelevant compared to this question. There is no way to empirically argue what people "deserve." Its not a question of evidence, but of moral judgment. It's my moral judgment that the state should not be taking the lives of its citizens, no matter how vile those lives are. But that is NOT a firm moral judgment; as I wrote, I've gone back and forth on this, and I respect those that disagree with me on this question.