What are things I learned in the boy in the striped pajamas?

After reading The Boy in the Striped Pajamas, students should have learned about human nature, genocide, and innocence. Human nature is a major theme in the novel. Students can contrast the kindness of Bruno and Shmuel with the horrors the Nazis are perpetrating on the people in the concentration camp.

the main reason that the constitution did not proclaim all men to be free and equal is because of the issue of slavery.