I find it hard not to call it murder. We’re human - we’re going to make mistakes - that is 100% inevitable.
As a result, if a country goes for the death penalty, then that decision is going to be taken in the sure and certain knowledge that it will lead to the deaths of innocent people.
The significant majority of the research I have read indicates that the death penalty does not deter capital crimes more than life imprisonment. On that basis, there is no gain to be had from taking a decision which will kill innocent people.
I can’t distinguish that from murder.
Could there be any greater conceit, than for someone to believe that the universe has to be simple enough for them to be able to understand it ?