I think I am in broad agreement. If someone isn’t an immediate threat (and in the case of capital punishment they’re by definition confined and separated from society) then there’s no justification for killing them.
I’m not a complete bleeding heart here; I am not going to pretend that the world is a worse place because we killed Ted Bundy. He was an awful human who you could make a pretty good argument for deserving to die. I just find the idea that the state is killing people pretty bad.