"...armchair warriors..."
I read an account by a German OrderPolizie who was part of one of the first Judenakton in Poland. He was assigned to take an older man into the forest and shoot him. He found that the guy was German, not Polish, and a highly decorated veteran of WW1.
Still shot him, but apparently felt a little bad about it.
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I try to keep telling people who say that if there is a CWII that the cops will rein that this is the reality...