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.
That's more or less how I see it. Leaving with a full understanding that war is a racket, the empire is irredeemably evil, and that anyone who joins is probably setting themselves up for something terrible. It's a point of commonality I can use as a weapon against flag-fuckers and little big men to undermine both their nationalism and masculinity. My skillset as a combat medic is practical elsewhere and I can teach really specialised concepts to comrades in left militias. If someone says they're considering joining I start with a conversation about my old patients' medical records. The environmental poisoning and the dysfunction of the VA after you're exposed to XX carcinogens the military will lie about until most of the victims are dead. Then it's the statistics for SA and suicide. Then it's the reality of those statistics and how corrupt NCIS and Big Navy are. I finish it with detailing how threadbare it is, how incapable it is as a result of that, and how it can't hope to win a war in any kind of meaningful way. There are countless veterans watching the retreats from their wheelchairs and they all have to ask if it was worth their injuries to hand over Afghanistan to the Taliban as if nothing happened.