unquestioning adherence to tolerance and politically correct are red-herrings thrown out to diminish the ideas of people who are trying to be aware of and open to people who have ideas different than their own.  I don't know ANYONE who is unquestioningly tolerant, and most liberal/progressives that I know of aren't unquestioning about anything - we love to question!  And the only people I ever hear use the phrase "politically correct" are those on the right-end of the spectrum, setting up (again) a way to dismiss liberal/progressive thought.