That wasn't so crazy back in the time; it had many time-honoured precedents, ranging from the Boer war internment camps to the SWA internment camps, to the ones

That wasn't so crazy back in the time; it had many time-honoured precedents, ranging from the Boer war internment camps to the SWA internment camps, to the ones in WWI in occupied France and Belgium, and, of course, the make-belief internment camps for Armenians in Turkey; a really good book that explains how the idea that interning a whole ethnicity was a good idea sprang up is "Absolute Destruction" by Isabell V. Hull. (Note: the US and what it did and does, does not exist in isolation; these outside-US developments are germane. Also, it was evil and cruel and contra-productive, but that wasn't a problem, because since it was what you would do, in case of war, it had to be done.)