That the media can be complicit somehow in the terrible events it is supposed to be reporting?
shareIt's been years since I've seen this movie, but from what I remember it's rooted in the famous Nietzsche quote: "Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you.
In the context of the movie, documenters decided to shoot this psychopath doing his thing without intervention, out of the arrogance that they would be able to separate themselves from what he was doing. But what happened is that they became tainted by his evil regardless because they spent so much time with him that they became a part of his world.
I guess the point was to criticize a prevailing trend in media that it's acceptable to shoot something evil that is happening before your eyes without doing anything because it's all in the name of "objective" journalism. It's not realistic to expect to do that and not be negatively transformed, to where you and the subject you are documenting become one and the same.