It also dispels the notion that only whites are racists as the Japaneses were just a bad, if not worse, than anything Americans have ever done.
It’s no different today. Any honest look at what the US has done around the globe over the past 25 years would show that this country is following directly in the footsteps of the Nazis and Imperial Japanese.
We are so far from civilized today, that not only is torture considered a reasonably debatable proposal, but it’s actually been national policy for a long time now.
The idea that it can’t happen here - especially when we’re right in the middle of it - is a common but almost always wrong illusion.