Mr. A and Mr. B are fighting together. They are shouting bad things at each other.
Each is saying why he is angry at the other.
Now a lawyer is very familiar with such a situation. He listens to Mr. A and to Mr. B and truthfully speaking he sometimes cannot make any sense out of either one. They say they are fighting but when one tries to bring them together to discuss it, they simply fight some more!
Two men, two countries. It is the same. Each says why he is fighting. But this does not solve it. We still have war.