There is no thing like "just war". Justice is a concept for peace. As I said, I do not see reason in mixing standards of peace with standards of war, and vice versa.
Look at the face of a soldier lying dead on the ground with his face blown away from a bullet, and then try to argue concerning "justice". It does not matter what uniform he wears.
justice only plays a role in reasoning over the question wether one wishes to go to war, or not. Once the decision for war has been installed, justive stops to exist. There even is no injustice. There simply is war. War means the gates to hell have opened. So be careful wether or not you wish to vote for war - you've been warned.
Think of it as entering a differerent world, another planet, with a foreign race of aliens, whose language, culture and thinking you do not understand, and whose acts appear to you to be insane.
I frankly believe that there are only wars of choice and wars of need. WWII was a war of need. Iraq was a war of choice. What a "just" war should be I even cannot imagine. To me, "jujst wars" is just an eyxcuse to nice-talk war in general and make it easier to be accepted by the crowds, and make it easier for soldiers to do the killing.
