Many people are stupid. Those people call into radio shows.
Solution, don't listen to radio shows that are caller based. That is how stupid spreads.
Sadly it's just as bad or worse in any comments section of online articles (check PFT, espn or nfl.com). At least It's getting better on this board (although if we had been coming off of a blowout loss when Cam didn't play well, I bet it would be a different tone).