The correct answer to this open question is the following.
Unfortunately, you forgot to include the name of the movie. What is the name of the movie you are referring to?
Without the specific name, we can not answer your question. It could be any movie about the Germans in World War I or World War II. And there are many movies about those topics.
However, trying to help you we can comment on the following
Many movies produced in the United States portray Germans during wartime as cruel and heartless.
For instance, there is a movie titled "The Boy in the Striped Pijamas," which portrays the cruelty of Germans during World War II and the Holocaust. It portraits Germans capturing Jewish people and sending them to concentration camps and one can see how they were treated, how they lived in inhuman conditions before being sent to the gas chambers where the Nazos killed Jewish people.