With reference to the incident with Kotler in Chapter 15, explain why Bruno betrayed his friend.

Lieutenant Kotler returns and scolds Shmuel for not polishing the glasses. When he accuses Shmuel of stealing food to eat, Shmuel tells him that Bruno gave it to him, and that Bruno is his friend. But when Lieutenant Kotler asks Bruno if he knows the boy, Bruno denies it. Lieutenant Kotler tells Shmuel to finish polishing the glasses, and that when he brings him back to the camp, they "will have a discussion about what happens to boys who steal" (173). When Lieutenant Kotler tells Bruno to go read his book, Bruno obeys and leaves the kitchen, feeling incredibly guilty about having betrayed his friend.