Presumably the majority of the Russian, Kazakh, and probably Polish and Romanian-rooted Germans are descendants of the post-war ethnic Germans from those countries, i.e. it's pretty meaningless to talk of them as being from "migrant backgrounds".

The real measure of "immigrants" would be the 2 million or so who predominantly speak a language other than German at home.

_{It is rightly acknowledged that people of faith have no monopoly of virtue - Queen Elizabeth II}