Political correctness ends at the privacy of the polling booth - that is why polls are wrong so often.
Since man is a social animal, he hates unnecessary confrontation. What used to be manners has now evolved into "political correctness". What is "political correctness"? It is the set of rules, or even better, what is known in mathematics as the group, that has as its axioms non falsifiable theories from sociology (regrettably called a science). How manners, that societal norm to further harmonious interactions, has transformed into political correctness shows the power of the press.