It's a language thing and is so embedded in our controlling social system that we can't think any other way. Being offended simply cements the regulatory system in place. It's not just the schools, but politicians, advertisers, and employers who have bought into the use of language as control. Attempts to break out of the controlling language are also absorbed into the system, so there is no 'outside' to this universe. It is self-contained, including protests, self-perpetuating, consuming everything like a black hole, and no one has the moxie to break out for long. Could be worse: Arabs let this happen to their language 1000 years ago and they are so cut off it's like their universe bubble cannot be reached from outside and they cannot communicate to the outside; they live in a totally different universe with different physical laws and always will.
I have said almost the same thing since we lived in Morocco in the early seventies. They think and reason totally opposite of how we reason. I often wonder what our government means when they say they are negotiating with Arabs. I don't know how it can be done. Their whole thought process is so far out there I would think it is impossible.