I never watch documentaries that purport to describe an event in history. The flaw is exactly what you describe in your review. In the hands of a filmmaker and editor, the story does not have anything to do with 'history'. It is someone's interpretation of an event. That's not history.
You do a good job of spotting bias here.
Thank you @agmoore, it's exactly like you just said. More like a point of view/storytelling thing than related with true events of American history...