I watched the screening of JoJoRabbit, The director Taika Waititi gave a brief introduction about what inspired him to make the movie. It was something about a book which is a real-life story.
In the movie, there is a scene, where the SS Generals are searching peoples houses for Jews. The Jew pretends to be the kid's sister. One of the Officers finds out that she's not his sister and lets her go. Does anyone know why? Is it the same in the real-life story?