The problem / question is not why or how these events happened, but is that are these considered as war crimes / massacres / genocides??? Has ever anyone was charged for such crimes? Or at least, crimes?
A more general thing, would be as follow:
Shooting Medical personnel and attacking Hospitals, are considered war crimes...
How many Hospitals were attacked during war? By all sides.
How many medics and doctors were killed, wounded, captured or missed during ww2 by all sides?
On the other hand, Shooting unarmed military or civilian personnel who are already surendered, is also a war crime, again, was anyone charged for this? From any side!
What about the great famine in Iran, during WW1, have it ever been discussed? Again, was anyone ever charged?
In all cases, noone was ever charged, execute nor imprisoned. The real mother whore criminals were, are and will be free forever!
Germans, Japanese, Russians, French, Arabs, Turks, even Iranians, etc, noone did anything wrong!!! I wonder who had killed all these people's and destroyed all these buildings???
You're not much difference than Arabs and Turks, in my eye, as guilty and dirty, as they are.
All these talks of losses and other things, are just night tales for babies, the truth is something else!!! The US wanted to be only hero of the war, the only one that has defeated both Germans and Japanese, but Russians were faster and captured Berlin sooner than US troops, so only place to capture was Tokyo, and they would do anything to capture it before Russians, even if it means loss of hundreds of millions of people, Japanese and American.