As much as I admire and respect the work and words of Neil Gaiman, this meme that is said to be quoting him (I have not verified that this is the case) is half right. It is only half right because there are two kinds of political correctness.
The first kind, “treating people with respect,” is a very worthwhile impetus: treating people in ways that demonstrate we truly value and respect them and what they have to say is something we should do all the time, regardless of who they are. I see this kind of “Political Correctness” as one important way of living Christ’s command to “love thy neighbor” in everyday life. So, in this light, Neil Gaiman is absolutely correct.
But then, there’s the second kind of “Political Correctness”…
The Here and the Hereafter 