(Why did Japanese troops do such atrocity during WWII, while Japanese people are so gentle and polite in Japan? Some foreigners sometime really wonder so.
The key is prejudice, ignorance, indignation, and disdain in addition to biased reports, news, and information on the atrocity provided by foreign media.
Chinese leaders have been traditionally and dangerously nourished prejudice and ignorance on Japan, Japanese people, and the Japanese culture, partly because, to your astonishment, they could not understand Japan and Japanese, for the Japanese culture is so unique.
Therefore Chinese elites seldom showed due respect to Japan while their bureaucrats, generals, officers, and soldiers were not well disciplined, educated, and trained.
Japanese generals and officers could not help but disdain those Chinese bureaucrats, generals, officers, and soldiers while being provoked by bad manners and irresponsible behaviors by those Chinese elites.
If enemies looked so mean and coward, Japanese samurai-like officers would not stop their soldiers from treating their enemies coolly.
On the other hand, without correcting their prejudice and ignorance on Japanese and Japan, Chinese elites asked American politicians and media for help.
That is why you, even to this day, so often hear atrocity conducted by Japanese troops through U.S. media, while you find Japanese people so gentle and polite in Japan.
This is humble defense against attacks, based on prejudice and ignorance, to Japanese and Japan who could not unfortunately free themselves from indignation and disdain on their old enemies.
Though Japanese troops committed some grave crimes in WWII, they should be pleaded for, if they are still to be judged by citizens in the world 60 years after the dismissal of the troops and the wars.
[In my personal view, it is very deplorable that some Japanese hold indignation against some U.S. media under strong influence of Israelite Americans attacking Japan in real and in harmony with Chinese elites.
But, I deplore first behaviors of US media under strong influence of Israelite Americans and then response from some Japanese. We have to talk about Israelites rather than Chinese anyhow.
Now, you know why God has not punished Japan after WWII so badly. Besides, I am Japanese, to tell the truth.])
"PEACE ON THE EARTH TO THOSE WITH WHOM HE IS PLEASED"