You are wrong, he is not one of us, Poles.
How is he not Polish?
He was born in an area that was Polish from 1349-1772 and again from 1920 or so until 1939.
Is it because he is of Jewish descent and you consider that to be a non-Polish ethnicity?
I know the area where he was from changed hands repeatedly, hence Lvow, Lwow, Lviv, Lemberg; all names for the largest local city and the multiplicity of ethnicities inhabiting the area, Poles, Ukrainians, Russians, Ruthenians, Jews, Gypsies....