Earlier quoted context omitted.
Why would there need to be appearance of re-education? The society doesn't owe anyone a re-education. It's not really about punishment either... If someone doesn't respect others' life and property, why would theirs be respected at all? There's no more revenge here than in drowning a tick that bit you instead of releasing it back into the wild. In abstract, I'd apply it to many more crimes with an unambiguous victim…
Maybe not vengeance, but there is passionate cruelty in drowning an ant if you had a vision of the world where the ant was no longer dangerous. What's wrong with indefinite imprisonment over death? Now you can figure out if you accidentally killed people, at least; you don't need abuse to accidentally put people to death. And on the matter of death penalty, does one lead with an attitude of "Why should we help unless…
I am morally indifferent between life imprisonment and death, but life imprisonment costs more and can fail. On the other hand, the original comment framed death penalty as "hypocrisy" of "justice being about re-education"; I am saying justice doesn't have to be primarily about re-education, no supporter of death penalty argues that; there's no hypocrisy. I think the removal is the most important component. Punishment and re-education should be prioritized depending on the crime, but in any case both are just nice, optional perks.