Maybe Kotler is not a Jew many Germans hate Nazis fled the country(like Kotler father).If he was a Jew couldn't be a SS soldier and he wouldn't killed Jews.In book not write that he is a Jew.Maybe his father left the country for other reasons?
Answers 1Add Yours
The only textual evidence we have is when Kotler was having dinner with Bruno's family. It is only speculated that Kotler's father could be a Jew. Indeed, he could have been other things but Kotler's own identity and anger problems suggest that he could be Jewish.
“And what reason did he give, I might ask,” continued Father, “for leaving Germany at the moment of her greatest glory and her most vital need . . .”
Many Jews fled to save their lives. Those who disagreed with the Nazis generally remained silent or went underground.