What is the challenge or conflict does Bruno incounter?

In "The Boy in the Striped Pajamas," Bruno faces the challenge of grappling with his understanding of friendship and loyalty against the backdrop of his father's role as a Nazi commandant. His innocent friendship with Shmuel, a Jewish boy on the other side of the fence, exposes him to the harsh realities of prejudice and the consequences of war. As he navigates his sheltered world, Bruno's internal conflict deepens as he begins to question the values instilled in him by his family and society. Ultimately, this leads to tragic consequences when he disregards the barriers between them.