I agree, but, to some extent I think when you go so far as to equate someone as being racist for using racist terms, or, as above stated, calling someone sexist for using derogatory words to describe women, it's an extrapolation.
This is often a tactic to take things to another level, If I say "Meat is Murder"..then every non-vegetarian is a murderer?
As soon as somebody uses *buzz* words like.. racist! ,sexist! ,nazi!..
it makes everyone listen..
people on the extreme right and left do it all the time, to get attention.
PETA does it in their ads...equating a woman who owns a fur to a brutal murderer is a stretch,but, it catches your eye.
I do agree that places of business are a hot-bed of political correctness, and one has to watch what they say. A Business monitors their workers for appropriate behaviour for fear of lawsuits..not because they are trying to make the world a better place.
Flat out, a racist is a person who deliberately discriminates against another simply because they are from another race.
It's not the guy who's driving behind you and gives you the finger and yells the "N" word as he speeds off that you gotta worry about..it's the employer who quietly tosses out the resume of a black person in favor of a white worker..