Others are hung up on not understanding the difference between ovo-lacto vegetarians and vegans. Yet another seems stymied as to how they are supposed to cook vegetables with no oil. Really? You've never heard of steaming? Sauteeing in broth, wine, or water?
I could really care less what other people eat (at least if they are adults--I do think that kids should have to try new foods and make some food choices). What's a bit exasperating is what the comments indicate about people's critical thinking and reasoning abilities. As a culture, we've slid into this sort of "react" and "rationalize how I feel" mode rather than logical arguments. People commenting on the video have also apparently not watched the film itself, or only watched the film without doing any other reading or looking squat-all up before posting.
I know I'm probably more analytical than the average CNN reader, but it irks me that people are using anecdotal evidence like "My grandpa ate a block of lard for breakfast every day and lived to be 100" to say that people shouldn't consider a plant-based diet. I guess I shouldn't worry about it, though, as anyone who is turned off of plant-based eating because someone by the screen name of "Sue Donym" says they are a scientist and that a plant-based diet is too extreme, too expensive, and too dangerous is just looking for an excuse to keep popping statins and going through the drive through.