Peter Watkins is maybe the most efficient political director ever.
Although his focus points are clear and his opinion may seem apparent, the audience remains able to develop its own thinking all throughout the film. Minutes go by, and more questions come up to you without them ever being explicit in the movie itself. Some problems find answers, but others are yours to deal with.
Very few directors have been able to reach such levels on topics that are as hot as the ones tackled here. A little bit of research on Watkins and his approach to audiovisual communication tells how dangerous his mastership of cinematic technique is.
Whether you agree with his political opinions are not, the man is a genius.
One of the most important filmmakers to have ever lived, and I'm counting them on my two hands only.