> The US also rounded up racial undesirables into camps and used them for labor

This was also bad, yes.

> there's a reason that Roosevelt is looked upon more fondly than goddamn Hitler

Sure, but "less bad" isn't the same as "internment good", and the winners write the history. I am a fan of FDR! But he did some miserable shit to win a war that needed to be won, some of which we cringe at now.

A handful of Nazi war crime prosecutions fell apart because Allied troops widely did the same thing, for example.