Emeraldlady:
No I didn’t miss that. Because we are now as a community more able to protect the community by better prisons systems, there is no justification to kill dangerous criminals. That is what the Church is saying.
This point keeps resurfacing, but it is no less wrong because it is common. Capital punishment is not justified by whether or not it is needed to protect the community. That has never been the justification for its use.
The real question is whether the person deserves to die because of the nature of his crime. If that answer is no then it would be unjust to execute him even if it was thought necessary for protection. On the other hand, if the answer is yes, he deserves to die, then it is appropriate to decide whether executing him would be harmful to the community in some way, but if it is seen not to be then what is the argument against imposing the sentence his action deserves? That is in fact the very definition of justice.