German atrocities were not revealed until the war ended and then only in murky pieces. The reporting on Japanese atrocities towards captives was very much an ongoing raw part of war reporting, primarily because the tortures were so incredibly barbaric to a civilized world otherwise fighting under Geneva Convention rules. The ruthlessness of the Japanese initially made the Germans look like rookies and raised an entirely different type of anger in the Western world than that towards the outwardly-complying-with-Geneva-Convention Germans.
I will not dispute that some Western Civilization internments (in the USA and in other nations) were of completely innocent men accused of being collaborators - i.e., neighbor ratting out neighbor or businessman ratting out a competing businessman for political/vindictive/personal gain reasons. Such is human nature and likely will never change. But I do find myself agreeing completely with the policy of removal within the context of an active and ongoing World war, and the practice of relocating the entire family instead of separating the men out and leaving the women and children behind to fend for themselves in an increasingly hostile environment. Had the Japanese military adhered to the Geneva Convention, perhaps there would have been less anamosity towards the Japanese as a whole.
"Sinister" is a good adjective for the behavior of the Japanese military during WW2, but it is especially poorly used as an adjective to describe Japanese interment camps and counts on the listener being completely ignorant of historical fact. Never Forget
The other 150,000 were free to continue roaming around.