In these cases, where there is an unjust aggression, I can only say that it is licit to stop the unjust aggressor. I emphasize the word: "stop". I'm not saying drop bombs, make war, but stop the aggressor. The means used to stop him would have to be evaluated.
Pope FrancisWorking for a just distribution of the fruits of the earth and human labor is not mere philanthropy. It is a moral obligation.
Pope FrancisFor us Christians, love of neighbour springs from love of God; and it is its most limpid expression. Here one tries to love one's neighbour, but also to allow oneself to be loved by one's neighbour. These two attitudes go together, one cannot be exercised without the other. Printed on the letterhead of the Missionaries of Charity are these words of Jesus: "as you did it to one of the least of these my brethren, you did it to me". Loving God in our brethren and loving our brethren in God.
Pope Francis