That is, in terms of war, a just war discussion.
In terms of maintaining civil peace, it is a justifiable force discussion.
I’ve never found any argument that truly was as rational as the individual, community, and international self-defense arguments.
It is very rare that both sides will agree that a war is just. The only example I can think of is when Germany acknowledged very shortly after the end of WWII that the Allies were justified in stopping the Nazis.