Japanese soldiers were trained to kill without emotion and destroy without remorse.
That is the point. They were trained up into an evil system and many of them did evil things, and they were endorsed. Vastly fewer American soldiers and marines did evil things. But some did, and they were often punished. My dad fought in the Pacific War and I grew up in a home that hated "the Japs." He told me of his real experiences. Sixty years later, it is not so terrible that these former enemies speak about equivalent "emotions" and glance over their actions. We are a just nation and most of our wars have been just. Still, we are prouder of some than others. I am glad that the Japanese are beginning to look at this at all.
It wasn't training, it was brainwashing- to serve the human God emperor.
THOU SHALT HAVE NO OTHER GODS BEFORE ME.
Correct. Our mindset was worlds apart. We were fighting for freedom, they were fighting for their emperor.