In my experience, particularly in the workplace, people who dissent or challenge or provoke, they are still punished for it in some way even when it's coming from a principled position.
By Barry's telling, Burt is gaslighting the community, convincing them that anyone who sees an issue with these sort of things, they're the one with the problem.
I don't know what the hell the stock market has to do with the fact that I have a problem with a country that chants death to America with the Ayatollah leading the chant in front of the entire country.