There is no number of foreigners that is unacceptable to sacrifice for a middle class livelihood. Anti-cop because they can imagine a scenario where a cop inconveniences them. These principles don't apply to the Waffen SS because they can't imagine a soldier personally inconveniencing them and, of course, foreigners aren't really humans.
Its worse actualy, the choice is between enlisting and possibly having a crappy life thats still COMFORTABLY better than the living conditions of most people the US army kills and immiserates around the globe. The choice almost never is "enlist or live like a middle eastern poor person"