Descriptivism is when you’re wrong. 50% of the participants in this conversation say so, therefore it’s true.
Similarly, if the majority of people take the word “Juden” to mean subhuman monsters of a specific ethnoreligious group that are a threat to society that should be rounded up and genocided. Why are they wrong from the perspective of linguistic prescriptivism?
What’s the linguistic prescriptivist definition of communism? None of what you’ve said has anything to do with definitions - only assigning now meaningless labels.