A professor of linguistics explains how (and perhaps why) the US has
converted racial slurs into taboos that can't be mentioned, not even
to discuss them.
I agree that overt racist attitudes should be "ridiculed and socially
punished in general society"; it is wrong to make racial slurs against
anyone.
However, that is no reason to put taboos on them. I am opposed to
putting taboos on any words, for any reason, because they gratuitously
tie society in knots. When the taboo is on a racial slur, it
prevents discussion of racism,
and famous anti-racist statements
cannot be quoted.
The same hypersensitivity does its harmful work when students seeing a
picture of George Washington with slaves are "triggered," and lose the
ability to think and speak about the significance of the fact that
Washington owned slaves.