It has already happened. I was born in USSR and live in Russia, and when I hear or read anything about USSR or Russia in Western media, it makes my hair stand on end.
But if I try to explain what it was really like or what it is like now, I only get insults in response: "Putin bot", "Kremlin shill", "as dumb as Trump's followers", etc. So I gave up and stop trying.
But it's clear that there're several "versions" of the reality, some of them are very far from "real" reality. And the divide will become only deeper. I also notice that comments on social networks and youtube became so weaponized that I simply cannot read them and stopped trying. I actively avoid reading any comments on any website with only 3 or 4 exceptions (like HN).