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.
I think that "letting go" should only be an option for people who are genuinely switched sides to the revolution. But you wouldn't have much success to switching them without even showing them that this option even exists.