You mention a word used by a broadcaster that was "racist". Not all your readers would have seen this word used so, you could put it into your story under the context of education.  Maybe some of us would like to ensure we do know the true meaning of this mysterious word. Allowing PC to put a crimp on ones writing only allows the continuation of ignorance and racism. I would not call you racist if you used the word to educate me, unlike some who use the word to demean a race.