This exemplifies two of the worst vices of the contemporary left. First, they're control freaks. They want to control the words you use and even what you think. Not an original observation, of course; George Orwell had something to say about it. But also, note the mission creep, born of their essential totalitarianism. Exposing racial animosity was, I suppose, a good thing, though finding out why that animosity exists would be a better thing. But it wasn't enough; they had to use their new toy as a weapon against conservatism (I'm 'transphobic' because I made fun of a man who pretended to be a woman in order to slime a female Senate candidate by comparing her to a porn actress). And now they're constructing an index prohibitorum of words you can't use, and even words whose usage is limited to the contexts they choose.
The way to deal with these little kommissar-wannabes is mockery, and I encourage fellow members of the UNL community, and others, to mock them at every opportunity. Run your language by them to see if it's halal (oops!). Lampoon their most egregious overreaches. Give them good old Nebraska heck!