Boy in the striped PJ's Chapter 7

1. How is the mother's defence of Herr Roller entirely ironic? She is being defensive about a man on the street where there are Jews in concentration camps behind there house where she isn't doing anything about it.
2. What role does Kotler represent historically in the novel? (think beyond being a soldier) That before he became a Nazi, he had a childhood with friends and he had fun, it wasn't all just war or planning to capture the Jews
3. What character is Kotler juxtaposed with in this chapter? What effect does it have on understanding each of these characters? The Juxtaposition is in  this chapter is Bruno's childhood and Kotler's childhood. Bruno's childhood was happy, except there was a war going on and he didn't even realize whereas Kotler's was without war, a better childhood before the war where he didn't have to move because of his fathers work for the Germans
4. How would you compare the interaction Bruno has with Pavel to all the other interactions Bruno has had with adults? 
5. Why is juxtaposition a key technique employed in Holocaust texts? How has it been used in The Boy in the Striped PJ's?