Bruno's fed up, which means it's time to talk to his pops.
Flashback: An official car with red-and-black flags takes Bruno, his mother, and Gretel to the train station; his mother says they shouldn't have let the Fury (a.k.a. the Fuhrer, a.k.a. Hitler) come for dinner. Bruno sees large groups of people (make that Jewish people) on the other side of the tracks.
Back in the present, Bruno has a heart to heart with his dad and tells him he doesn't like the new home.
Guess what? His dad doesn't really care, and tells him to accept the change and follow orders.
Before Bruno leaves the office he asks about the people on the other side of the fence.