WRT magisterial teaching, the fact that the bishops of the US meet together and decide something carries no more weight than one bishop saying something.
Here is a review of a book which examines the DP from several angles:
A Catholic Defense of Capital Punishment
The review includes very quick explanations of the Church’s view on the DP.
I took a look at the review at your link. Right from the start I had a problem with the way the argument was framed. The issue surrounding the death penalty isn’t about a clash between
justice and charity, but about how to enforce
justice with mercy. When you frame it that way, there is no conflict.
Frankly, the following sentence from that review is just plain ignorant.
“On the other hand, to say that this dignity invalidates the claims of justice and overrides the rules of the moral order is self- contradictory, for human dignity rests upon man’s ability to know and observe those rules.” [italics added]
Says who? For the past 150 years, the Church has been moving in the direction of an ever greater appreciation of the revelation that
every person is created in God’s image. That is the foundation of human dignity, not whether we “observe the rules of the moral order”.
We killed Jesus. If he had given humanity what it deserved for
that violation, the last day of human existence would have been Good Friday. It’s good for us that
Christ is merciful and did not zap us into oblivion on Easter Sunday.
So we also must be merciful and NOT punish people as they deserve to be punished, because that’s what Jesus did.
We are created in the image of God and need to act like it. This is the foundation of all Catholic Social Teaching. The revelation that we are created in the image of God and have a duty and responsibility to act like it ties together issues as diverse as abortion, the death penalty, immigration, workers rights and environmental protection into a
consistent ethic of life with respect to how we behave and treat one another.
If you disagree with the Pope and Bishops about death penalty, then you need go back and read what they have written with an open mind and heart, and try very hard to understand what they are saying. The Pope and Bishops have stated very clearly and unanimously that the death penalty falls under the broader doctrine of the inviolability of human life from conception to natural death. Once a person is in the custody of the state and no longer a threat to society, no legitimate argument can be made to kill him. That is what the Church teaches today, and that is why
Catholics in the United States cannot support the death penalty.
I understand that this is a hard teaching for you. I don’t know why, because it makes perfect sense to me. It’s really pretty simple and I think that if you tried to understand what the Pope and Bishops are saying, rather than looking for excuses to dissent, you will see how beautifully it fits the Gospel.