Of course the aggressor that has breached the agreement would say they are justified. Of course the weak and gutless Obama would say that the treaty does not apply. If it meant he had to do something brave, he would run away faster than Hussein Bolt.
The Ukraine had defined borders and they entered into an agreement to maintain those borders with the USA. The USA reneged on that agreement to, once again, abandon one of its allies and another of its commitments.
It is common in the world today that our enemies do not fear us and our allies do not trust us.
As a country under the feckless leadership of the weak kneed Obama and erratic policies, we have earned both positions.
I am not of the mind that a man is either of science or of religion. At his best and his worst, man exists in the misty glimmering where the falling angel meets the rising ape. That he chooses a direction from that point defines him as human.