In the Trump bid for racial purity there is an extreme example that could expand the concept of immigrant or foreigner. The Third Reich.
Just replace immigrant wherever the Word Jew or Jewish appears.
Of course the Nazis included gypsies, intelligentsia/critics and the handicapped in their purge.

1. Standard Definition of a Jew:
Under the Nuremberg Laws (1935), a person with three or more Jewish grandparents was considered Jewish, regardless of their own religious practice or identity.
This meant they looked back two generations to determine Jewish ancestry.
2. "Mischlinge" (Mixed-Race Individuals):
Individuals with one or two Jewish grandparents were classified as "Mischlinge" (mixed-race).
Their status was complicated, and they were subject to varying degrees of persecution and discrimination, often depending on the level of Jewish heritage.
3. More Stringent Requirements (e.g., for SS members):
Certain Nazi organizations, like the Schutzstaffel (SS), had even more stringent requirements for proving "Aryan" ancestry.
To join the SS, a candidate might need to prove that all direct ancestors born since 1750 were not Jewish, requiring genealogical research going back multiple generations.

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Parody lyrics moved to the Songs for the Age of Trump thread ---mudelf