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.
Not remotely comparable since the KMT had to resort to kidnapping random teenagers and forcing them to bear arms against the CPC. At that point, joining the Communists was pure self-preservation so you had a rifle to shoot the KMT goons who were about to kidnap you.