"strict linguistic terms" is not the problem, and sounds like a refusal to define words or an excuse to be sloppy with definition.
how do you say what you mean, if you don't know the definition of what you're saying and don't care either? i call that speaking in bad faith, which is what fascists love to do.
do you see "potential for solidarity" in using oppressive language? why not just say whatever racist shit you feel like and then excuse yourself by saying "oh that's not really what i meant, you see"? who are you building solidarity with when you do that?
"people will shut down if you tell then they're wrong" is defeatist nonsense, and also counter-revolutionary language. what is the point of education but to lead people toward changing their own mind?