History help needed: Does Just War Theory truly justify the triumph of good over evil?

Does Just War Theory truly justify the triumph of good over evil, or is it simply a justification for the use of force relative to the side one is on? Apply three Just War tenets to the United States and those same Just War tenets to the al-Qaeda and explain if the war on terrorism is absolutely just to one side, or if it is just relative to the side one is on.