Has anyone seen the movie "A real Pain" and was also bothered by this?

I recently watched the movie "A real Pain" and at one point, after the group visitied the Konzentrationslager they discussed how unbelievable it was, that just a 20 min drive away life at the city of Lublin went on as it was before. It felt like the movie makers had no idea, that Poland was attacked by Germany and not only Jews but also Polish citizens have been put into the Konzentrationslager. It gave me the vibe as if they tried to make it look like the Jews have been haunted and killed while Poland just went on with life in WW2. It really bothered me - anyone else felt this way? I mean I know that the Jews went through some horrible and cruel acts caused by Germans, but so did Polish people.