How we cite our quotes: (Chapter.Paragraph)
Quote #1
"Who are all those people? […] And what are they all doing there?" (4.190)
Bruno asks this question out loud to himself when he sees the prisoners for the first time on the other side of the fence. At this point in the novel, he does not know that the majority of them are Jews (nor does he realize that he is no longer in Germany).
Quote #2
[…] [The prisoners] were wearing the same clothes as each other: a pair of grey striped pajamas with a grey striped cap on their heads. (4.204)
Bruno is confused as to why all the people wear the same uniform. The only sense he can make of the clothes is that they're all in pajamas. What could be so bad about spending all day in your pajamas, right? Oh so much, Bruno—oh so much.
Quote #3
"Ah, those people […]. Those people… well, they're not people at all, Bruno." (5.283)
Bruno's father, like many of the SS, believes Jewish people are an inferior race, and therefore, not really people. Of course, he doesn't ever bother to explain to Bruno the exact details of why race is involved—or that they're killing the Jews.