In "The Boy In The Striped Pajamas," why does Bruno's family have to move?

Bruno's
father has risen through the ranks of the Nazi regime and has even entertained Adolf Hitler at
his home in Berlin, Germany. Bruno's father ends up earning a promotion and accepts the position
of commandant, which is the chief position within a Nazi concentration camp. In
order for Bruno's father to serve as commandant, Bruno's family must relocate to the Auschwitz
concentration camp, which is located in southern Poland. Since Bruno is only a
naive nine-year-old boy, he refers to Auschwitz as "Out-With" and does not fully
understand his new environment. Bruno's parents argue about moving the family to Auschwitz, and
Bruno absolutely hates his new home. Bruno describes the environment of his new home as
depressing and barren. However, Bruno ends up becoming close friends with a Jewish prisoner
named Shmuel. The position of commandant and the new home negatively affect Bruno's parents'
relationship. Bruno's mother turns to alcohol as his father remains busy with running the death
camp.