Where are we in the story:
Bruno slipped a little about his new friend Shmuel. He told his sister about an "imaginary friend". He is starting to understand a little more about what is on the other side of the fence but has not quite put all of the pieces together. Shmuel was there at his house doing some odd job before a big party for his father. They saw each other and Lut. Kotzler was about to find out about their secret friendship. Bruno has a feeling that he really needs to keep their friendship a secret. He is not sure why but does not trust those in authority.
Comment have been made about how naive Bruno is. I think it is important to remember that he is only nine years old. I am not positive I would fully understand all that is going on around me at that age. Being nine years old, you are still too young to understand social standings. You are still too young to understand that being of a different nationality, or race is something offensive at that time. There is still a sense of humanity there. It has never been explained to him what is truly happening behind that fence. Looking back at history, we see so clearly now. But good people do not automatically think the worst. That is something that I am really getting to understand reading this story.