That’s not true. The Catholic Church has always taught that it is lawful to kill when fighting in a just war.
I was referring to the current Vatican's hypocrisy in being against war when someone else is being invaded/attacked and then suddenly discovering that there is indeed such a thing as a "just war."
BTW, some of your hyper-traditionalist fellows on this forum sound like hippies in their blanket condemnation of "war." I suppose what they really mean is a war that could conceivably in any way eventually benefit Jews--you know, like World War II.