How does Father describe the people behind the fence The boy in the striped pajamas?

In "The Boy in the Striped Pajamas," Father describes the people behind the fence as "not human" and refers to them in dehumanizing terms, reflecting the Nazi ideology of the time. He views them as a threat to his family's safety and position, emphasizing his belief in their inferiority. This perspective highlights the moral blindness and cruelty of the characters involved in the Holocaust, contrasting sharply with the innocence of his son, Bruno.