I don't think MM is objective, as a matter of fact, he is subjective as heck. He sees some things in way you think are wrong, but hey, that is how it works.
I think most people are subjective as heck, that is just how it goes.
Still, you must admit, that some of the stuff in his movies is funny and interesting. Bowling for Columbine is intended to, amongst other things, show how, compared to the rest of the world, the US is gun crazy. Yes, I know we have te right to bear arms, blah, blah, blah. Good great, go get one. Still, I just think it is funny seeing the Michigan Militia walking around, saying they are just normal, camo, rations and all. Saying that if you do not have a weapon, you are unpatriotic.
I think it is funny, that people get a gun for opening up a bank account. I think it is funny, having McVeigh argue about what weapons people can own and interesting to hear his view on goverment.
Yes, it is intended to create controversy and does gloss over the some of the truth, but so it is with most of what you read, see or hear. It is up to you, to sort the truth from the chaff.