Originally Posted by
Aviatrix
If they were Jewish, and they left Germany during the Nazi period, then they (and their descendants) should come under the special provisions that apply to victims of Nazi persecution. I know several people who obtained German citizenship under those special provisions.
From what I understand his parents were not disseized of there citizenship (which is a valid reason) but never were and never applied for German citizenship. Being born in Germany never was (unil the 2000) a valid reason for citizenship.