In this case, it was a CNN newscaster, which is about as "mainstream media" as it gets, but I would extend the same criticism to anybody else who doesn't even p

In this case, it was a CNN newscaster, which is about as "mainstream media" as it gets, but I would extend the same criticism to anybody else who doesn't even pretend they have any background knowledge or research supporting their claims, just a teleprompter to read it from. The comparison was between source material and commentary, specifically commentary by people who don't even claim to understand the topic in any depth.