How else would you handle masses of criminal aliens? Would diffuse holding facilities of small size be smarter? Of course not. Facilities to concentrate the pop

How else would you handle masses of criminal aliens? Would diffuse holding facilities of small size be smarter? Of course not. Facilities to concentrate the population of criminals until they can be processed are going to be necessary, that is the inevitable result of porous borders. You seem to be confusing concentration camp - you know, any holding facility whatsoever - with death camps. They are not synonymous.