If “non-lethal means are sufficient to defend and protect people’s safety from the aggressor , authority [should] limit itself to such means, as these are more in keeping with the concrete conditions of the common good and more in conformity with the dignity of the human person”
(2267).
John Paul II, writing in The Gospel of Life, stressed that
“the nature and extent of the punishment [for capital crimes] must be carefully evaluated and decided upon, and ought not to go to the extreme of executing the offender except in cases of absolute necessity; in other words, when it would not be possible otherwise to defend society. Today however, as a result of steady improvements to the organization of the penal system, such cases are very rare, if not practically non-existent” (no. 56).
In modern industrialized states, killing convicted murderers adds nothing to anyone’s safety. It is an excess. It cannot be justified except in the most extraordinary conditions. Moreover, for John Paul II, the punishment of any crime should not only seek to redress wrong and protect society.
It should also encourage the possibility of repentance, restitution and rehabilitation on the part of the criminal. Execution removes that hope.
You’d have to read my comment “Perfect Justice is in the hands of God” in quite some distorted manner as if I had said “any & all” justice to think that such a statement argues against punishment and such a distorted misreading deserves no reply.