Earlier quoted context omitted.
Yet another illustration of the unintended consequences of authorizations by Congress for war (obviously, in this case, an unavoidable war, but still). The order to authorize internment camps was the result of two forces: * Intense and direct recommendations from FDR's entire war staff and intelligence apparatus, which believed that there was an unacceptably high probability that Japanese and German populations would…
If this is not an illustration of an executive power grab, what power authorizes the executive branch to round up a group of people? Even so, legal or not, there is no valid reason to legitimize the internment of Japanese-American citizens.
That's not a legitimization of the situation--you can argue that Japanese internment was illegal for other reasons, but we're not talking about the legality of Japanese internment in general. We're talking about the executive usurping powers reserved to Congress.