Answer; Everyone in the world except Dan and every leftist professor in America.
Jeez, lives in Vietnam, marry a local, speaks their language and STILL don't understand the culture.
He has the credentials to be an American professor!
I think I understand the problem. He is probably a very good English teacher and is used to saying things among hí colleagues that won’t fly in a public venue. People here talk about most anything in sometimes highly irreverent ways but don’t write those things. Unlike in the normal actually communist state people do not fear that their neighbors will report them to the authorities for slight or even some major verbal síns.