Who is a character who plays a small role in the book?

Neudorf is Friedrich's and the narrator's teacher who, in 1934, outlines 2,000 years of persecution against the Jews to prepare his students for Friedrich's expulsion to a Jewish school. He points out the intellectual superiority of Jews and begs the children to remain Friedrich's friends. Neudorf pays a visit on the Schneiders to congratulate Friedrich on his Bar Mitzvah and present him an engraved fountain pen. In my opinion, his character and actions are important because Neudorf stands as a representative for those who saw the coming atrocities and did what they can to avert them.... to educate others.