What is interesting about this documentary is that it is made not by conservatives, but by Canadian liberals who largely share Moore's left-wing perspective. They start out sympathetic to Moore, but, by the end, are finally forced to admit that Moore is a self-aggrandizing liar whose films, while entertaining and well made, are certainly not "documentaries."
The filmmakers are clearly not hostile to Moore or his politics. For example, they point out that Moore was absurdly and unfairly prevented from being admitted to his high school's "hall of fame." And one of their critiques of "Bowling for Columbine" was that Moore, instead of calling for a ban on the handguns which are involved in most gun crimes, launched into a convoluted critique of American culture. Most of the interviewees were left-wing activists who totally share Moore's politics, and worked with him at places like "Mother Jones."
So it is all the more damning when they expose Moore's shoddy propaganda. The film most comprehensively dismantled is the one that made Moore's reputation--1989's "Roger and Me." The whole conceit of the film is that Moore chases GM CEO Roger Smith around with a camera and microphone, but never gets an interview. In reality, Moore got a 10 minute interview with Smith, the transcript of which still exists, although Moore tried to get his left-wing colleague to deny its existence. Moore crafted the movie to make it appear that he was alone in his quest to call GM to account, when in reality, there was a huge union and activist movement calling for the same things Moore was calling or. Moreover, Moore changed around chronology and invented out of whole cloth a story about a stolen news van (and shot a fake local new segment reporting the "story"). He also created a scene to make it appear that he had been cut off from speaking at GM shareholder's meeting when, in fact, that never happened.
Then there is "Bowling for Columbine," in which Moore staged a scene in which he receives a gun in return for opening a bank account, making it appear that you could get the gun right there in the bank, when he knew very well that that was not how it worked. And his ambush of Charlton Heston, who was already suffering from Alzheimers, is aptly decribed by another left-wing activist as "mean," which it certainly was.
Moore is a good and entertaining propagandist, but he is no journalist and he has never made documentary in his life.