Also, when God punished Cain, we both agree God did not end Cain’s life but sent him away into the wilderness yet with a mark that prevented Cain from any further harm from others. In other words, banishment from society was the punishment Cain truly deserved.
Is it what he deserved or did mercy temper the properly deserved punishment. From EV:
And yet God, who is always merciful even when he punishes, “put a mark on Cain, lest any who came upon him should kill him” (Gen 4:15)… Not even a murderer loses his personal dignity, and God himself pledges to guarantee this. And it is pre- cisely here that the paradoxical mystery of the merciful justice of God is shown forth.
Or as St. Ambrose puts it, as quoted in EV:
"Once the crime is admitted at the very inception of this sinful act of parricide, then the divine law of God’s mercy should be immediately extended. If punishment is forthwith inflicted on the accused, then men in the exercise of justice would in no way observe patience and moderation, but would straightaway condemn the defendant to punishment. …
In this quote, Ambrose shows where the it is the contrition of the sinner that allows mercy to be extended.
In this regard, I do not really see the continuity in Catholic teaching. Currently restricting the use of the death penalty to instances only when it is needed to safeguard society, without regard to the exercise of justice or the contrition of the offender seems to be a new development to me. Not that it matters. In this regard I will be satisfied to restrict myself to the current Catholic teaching. It is enough that those that know much more about moral theology than I do restrict the death penalty so.
I never claim to be of superior knowledge in the area of moral theology. That is why I restrict myself only to area that I know about, to wit, can all violent criminals be safely incarcerated?
Now I will move to other questions. Violence begats violence I believe to be a slogan more than a truism. It is generally true. But other things can also begat violence. In the case of Cain, there was no previous violence to prod him to murder. Violence can also lead to peace. It was the warrior David that brought about the peace in the time of Solomon. Yet David was a man after God’s own heart. Saul had slain his thousands, yet David his tens of thousands. So we can see that in two cases the rule does not apply.
I think one way in which I differ is I see the culture of death as something larger than abortion, euthanasia and the death penalty. The culture of death also reigns in inner city gangs where kids are brought up to kill for money, revenge or kicks. The culture of death exists in prisons much more fully off of death row than on it. Prisoners believe their only chance to survive is to engage in violence. Gangs form for mutual protection and quickly evolve to predator gangs where the only way in is to kill and the only way out is to die. Prison violence does not get the press from the media that executions get, but it is much more of the prison culture than executions are.
Yes, it is vital that Christians are rooted in the sacredness dignity of human life, but not just the life of the violent offenders. We must also be rooted in the respect for life of the innocent who are the prey our society, both on the street and in prisons.