Earlier quoted context omitted.
The problem with banning things like "racism" is that words change meaning over time. Maybe some time in the future, any reference to "White Privlege" may be considered racist, for instance.
Or that these days even people of color saying the n word is condemned, whereas just a few years ago (months?) it was sort of accepted. Making that into a legal doctrine would be quite tricky.
e.g. The head of the NAACP used the word in 2003. https://www.nytimes.com/2021/04/30/opinion/john-mcwhorter-n-...