Nine times out of ten political correctness is just a thoughtless buzzword assholes use when they get offended by people getting offended at them for behaving like assholes.
It's completely divorced from its original meaning and intent, and is largely empty rhetoric held up by those who worry about "The War on Christmas" or the Nanny State or evil socialism taking over the US and similar non-issues based on grossly exaggerated or outright false examples.
Are there people who get offended too easily? Absolutely, just as there are people who seek to cause offense too easily and then hide behind the shield of political correctness to turn the criticism around as if they're fighting for freedom or something. But being offended by something has nothing to do with political correctness in and of itself.
On a related note, in my experience nine times out of ten those who bitch about hate crimes legislation are people who are historically ignorant or have never been terrorized for being a member of a protected class (white people are protected too, BTW). Therefore they think burning a cross on a black person's lawn is simple vandalism and spray-painting "Jews Must Die" on a synagogue is just harmless graffiti with no intent to terrorize or force people to leave.
Ah, but what of those of us who have been terrorized or abused in part due to attitudes about our social group and which are not classed as hate crime because it isn't about hate? That's the issue I have with it personally- it prioritizes some people's mistreatment above others by suggesting attitudes allowing for violence or intimidation against certain groups are wrong, but for others entirely acceptable.