Yes, but the German passenger being a collaborator and coward was completely made up! Christian Adams, the German passenger, was artifically singled out for villainhood. Imagine how his family must have felt when they went to see the movie. Irresponsible for the filmmakers to do that in a film that was otherwise so powerful and important.
The movie did not make the German passenger out to be a collaborator or coward. It showed a passenger that wanted to seek negotiations rather than force. I can't say if the scene (a short one) was made up or not (how do you know it was made up?), but if does represent a likely scenario. Continental Europeans are more likely to take such a position.