I tried to research as many of the facts as I could. I researched almost everything I saw and could not find any problems with what was discussed. I challenge you to do the same. It's shocking, but a very accurate documentary. The problem with a movie like this is that it is so foreign to Americans of all cultures. It's foreign because in the US we are only taught mostly about European / American history which doesn't include much on any other races. We are not taught history in American schools in depth. American history is inherently limited in nature. I think we have to do a better job with this.
If you actually take the time to research the information covered here, it is scarily accurate. One of the previous posters mentioned Queen Charlotte and was appalled at the fact that she cold be considered black. However, PBS did a special on her that proved this fact. Do your own research.
I think that all "histories" should be taught so that we can understand everything about every race. Blacks in America, more than any other group of individuals have lost more history than just about any one because of slave trade. Blacks make up prisons, unemployment, and significant poverty. As humans, we need to understand what really happened. Thus, Blacks especially should watch this. In general, all people should watch this. It can be healing to individuals who were stripped of their culture to understand that there were some significant achievements by people that look like them. You do walk away asking yourself some interesting questions. It should be OK for anyone to achieve anything and get credit for it, regardless of color.
I couldn't actually find anything I could say was untruthful or hateful in this movie. The problem that I believe people will have with this movie is the shock to find out so many places in history that were affected by Africans. I recently looked up a youtube video regarding Asians which mirrored the facts in the video.
If you want to stifle racial tensions in America, a good place to start is by dealing with and correcting inconclusive historical data.