Not long ago, Holocaust survivor Anita Lasker-Wallfisch met in a hotel restaurant in Germany with a man named Niklas Frank, whose father was a German war criminal. They’d both been invited to appear together to speak to history students. While preparing at the restaurant, Lasker-Wallfisch and Frank were interrupted by a man who approached their table and complained they were “spoiling the pleasant atmosphere with all this talk of Auschwitz.”