I just do not think it's rational to equate pejoratives and racism.
In my opinion, it's not meaningful when you use the word racism to describe something regardless of intent. What it really means is that you have been offended (which of course can be a bad thing as well, but not necessarily). "Offensive", "rasist" are both words describing the motives of the act, it's not how you receive it. People will always receive information differently, and that is why I don't think it's sane to use the definition you provided. I do believe that your definition of "racism" is not the literal meaning of it either, what does the lexicon say?
The real issue I see is that it increases the risk of dispute, even when there was no intent to start an argument. I believe this is part of why media is creating such chaos in our society, not for good reasons and just for clicks.
I respect your answer but I have to disagree.
I think it's possible to find an old mass murderous dictator using your rethoric.