Although he was a fierce, sometimes even satirical, polemicist, Frege himself was a quiet, reserved man. He was right-wing in his political views, and like many conservatives of his generation in Germany, he is known to have been distrustful of foreigners and rather anti-semitic. Himself Lutheran, Frege seems to have wanted to see all Jews expelled from Germany, or at least deprived of certain political rights. This distasteful feature of Frege’s personality has gravely disappointed some of Frege’s intellectual progeny.
Surprising to say at least.