I would say karma always comes for you because the owner of the camp had a son who was burned with other jews by accident and earlier the boy in striped pjamas was hit and tortured for getting food and the son said that he didnt know the kid in the striped pjamas
The main themes in The Boy in the Striped Pajamas are innocence, friendship, and human nature. Innocence: Bruno and Shmuel exhibit a childlike innocence. Bruno is largely ignorant of the horrors of the Holocaust, even when he becomes friends with a concentration camp inmate.
the reason why this was such an amazing scene in the book is because it was flooded up to throughout the entire book in itself, and it really lets us know how the relationship between the owner and his pets are.