Here is what the Church says…
‘Today, however, there is an increasing awareness that the dignity of the person is not lost even after the commission of very serious crimes. In addition, a new understanding has emerged of the significance of penal sanctions imposed by the state. Lastly, more effective systems of detention have been developed, which ensure the due protection of citizens but, at the same time, do not definitively deprive the guilty of the possibility of redemption.
Consequently, the Church teaches, in the light of the Gospel, that “the death penalty is inadmissible because it is an attack on the inviolability and dignity of the person”, and she works with determination for its abolition worldwide.
The development in this case is a deeper awareness and understanding of the dignity of the human purpose which has caused the Church was to change its position on capital punishment.
I get that some people don’t like or agree with this development, but the hierarchical Church is the authority and we are not.