Why did Keller not feel the need to act when the treatment of Jews was becoming more intense?

According to Henisch, the arrival of the Nazis prompted people to leave....... to disappear. Henisch acknowledgef that he stayed because he didn't have enough money to leave. When Paul asks if Keller tried to hide his wife, Henisch says that he did not. In 1938, Adolf Eichmann heard Keller play in Vienna, and as a result, Keller had been flown to Berlin several times to play for both Eichmann and Adolf Hitler. Keller tried to make himself so visible that no one would touch him or his family. Sadly, his plan backfired, and his wife was taken by the Nazis while Keller was in Berlin performing for Hitler. Keller's son, Eric, refused to be separated from his mother and was taken as well.