Im von den Nazis besetzten Polen wurden 1939 polnische Staatsbürger, die ohne Gerichtsverfahren zum Tode verurteilt worden waren, durch ein Erschießungskommando hingerichtet.

This photo was taken in September 39′ in Bydgoszcz and was just the beginning of nearly 6 years of horrors served by the III Reich on Polish population. My mixed ancestry family of Polish subjects / citizens for centuries spoke in their house both German and Polish. In 1939/1940 they ceased speaking German altogether.

German. Not “nazi”. German.
They don’t go anywhere, they are still here, it’s just politically incorrect to use a proper naming.