Yes. Did you?
Non negotiable means something
Of course it does. And the Pope said: "...she is thereby consciously drawing particular attention to principles which are not negotiable. Among these the following emerge clearly today: the protection of life in all its stages..."
Okay, so tell me how the death penalty and war don't fit into that non-negotiable category.
Catholic Doctrine states that war and capital punishment are justifiable under certain circumstances. I’m not going to fight theology with you. Look it up, read the Catechism of the Catholic Church if you are interested in learning more.