“Blessed are the peacemakers, for they shall be called the children of God.” Matthew 5:9
It is hard to talk openly about war being just or unjust while your own country happens to be in the middle of one (or two, or five). But, hey, if Christianity were easy, everyone would be doing it.
War is a tricky thing because, though most of the humanity’s dark history is filled with unjust and evil wars, every single one of those wars had people cheering them on, justifying them with all sorts of clever rationalizations and emotionally charged propaganda.
That means we Catholics need to be on our A game when it comes to this whole “Just War” idea, so that we are not caught on the wrong side of God’s desire for peace and thirst for justice.