The exact same thing happened in Hungary (sort of, we can't blame it all on the nazis, Hungarians did it enthusiastically themselves). They used the census data of 1920 and 1930 (but not declaring your religion and ethnicity was illegal) in the numerus clausus acts and then in the mass killings and holocaust (600k of 850k).
But after the 2nd ww, they used the same census data against the German minority as well, to evict them and move them en masse to Germany.
