>bombing Japan aside, the pacific war devolved into something a bit grotesque. The American soldiers marched towards Japan carrying around the skulls of the Japanese as trophies.
If you think that was grotesquely terrible, I really recommend a thorough reading of what the Japanese themselves did during their imperial conquests, WWII and their increasingly bloody, desperate retreats in the face of American power! You'll be breathtakingly surprised by what barbarity can look like outside what the Nazis did.
There was of course a major element of racism in the hatred American soldiers had for Japanese soldiers, but it was only part of it. The Japanese did themselves zero favors in their conduct toward.... pretty much everyone, and were barbaric even in their handling of captured or wounded enemies (not to even mention how they behaved towards conquered civilian populations, which in their own form of nearly nazi-like racial disdain, they often looked upon as little better than animals). All the racism aside, the Americans also had an enormous multitude of good reasons for hating them so much.. The Empire even treated its own soldiers viciously and inhumanely in just about every way, which certainly didn't help those soldiers' attitudes towards all others..