Who is told off by Lieutenant Kotler and why?

Lieutenant Kotler 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