Even not having the guts to imprison them here, in the US
Guts?? Are you crazy??
They would all have been freed.
You really think that they deserve the protections of the US Court system that would allow them to walk?
You do what Lincoln, Wilson and FDR did. Tell the court to ef off.
Congress declared war( were still in a declared war ) and the President has all powers to suspend all rights of any and all persons, citizens or not.