@LeinadT
"2. What if the verdict is actually correct? Then life imprisonment still works."
Fair enough, but this really doesn't give us a way to exclude the death penalty from the list of acceptable punishments.
"4. Yes, they can be rational, but that doesn't mean they can be deterred."
No, I agree. I'm sure that there are some people who are deterred by the possibility of punishment in general (and, by extension, of the the death penalty in specific), but I would never want to argue that it's anything more than a practical argument--and even then, not one that you could assert is actually true in all cases.
"6. I agree that the 'cheapness' argument should be ignored, but I think that in the first thread Ssorenn and maybe some others were talking about how bad it is to waste our resources keeping bad people like Tsarnaev alive. It's an important point to smash their economic defense of the death penalty by stating that it actually saves money to avoid execution."
Fair enough.
"7. Most first-world countries, including all of Europe except Belarus, have abolished the death penalty. Most countries that still use the death penalty are also *severely* lacking in other human rights categories. I'm not saying that this alone is a reason to abolish the death penalty, but it's not a bad argument for it."
I tend to think it's not a very helpful argument either way (it opens itself up to false analogy far too easily for my taste), but there you go.
"8. False equivalency."
I'll grant that on the restitution point (although fines paid to the government rather than to the victims would be outside the bounds of false equivalency), but not on the kidnapping one.
"An eye-for-eye way of doing things is, in my opinion, out of date. I vehemently don't think that's how our legal system should work, and thus I don't think it's good for us to do that."
THIS, I think, is the crux of the argument, and I'm glad you said it as plainly you did. I actually happen to think that "an eye for an eye" is abhorrent as a guide for private vengeance but that it's a reasonably useful principle for determining the acceptable proportionality of public punishment (emphasis on "reasonably useful" as distinct from "rigidly--or, to make a pun, blindly--to be adhered to in exact measure in all circumstances"). So I don't think that execution is disproportionate to the crime of murder. I would be hard-pressed to suggest that it's appropriate for any other crime, and I'm not prepared to argue beyond the basic point of applying it to murders that are deliberate and purposeful--however depraved the underlying reasons may be. Nevertheless, meting out punishment in proportion to the crime that it punishes seems to me to be a sign that society recognizes, abhors, and desires to stamp out evil. And this is, in my view, a Good Thing.
I freely grant that I have other reasons for approving of the death penalty in principle that are rooted in the Bible (and NOT, I hasten to add, in the Old Testament civil laws of Israel that people like to complain about), but I'll leave those aside for now. I also have reasons for disapproving of how the death penalty is often practiced that are also rooted in the Bible (the death penalty's application to the weak and the poor and not to the rich and well-connected in equivalent circumstances is particularly galling), but I'll leave those aside as well.