What is religion in the boy striped pajamas How do you know?

In "The Boy in the Striped Pajamas," religion is not a prominent or explicitly discussed theme. The focus of the story revolves around the horrors of the Holocaust and the friendship between Bruno, a young boy from a Nazi family, and Shmuel, a Jewish boy imprisoned in the concentration camp where Bruno's family resides. There are no overt references or discussions about religious beliefs or practices in the book or the film adaptation.