It's a monster of our own making. When politicians start courting that fringe, you get a virtuous cycle, where the fringe starts impacting policy, which emboldens and encourages more and more radicalization.
[1] Look at the rhetoric surrounding the AIDS epidemic, and tell me if anything has changed.
It's naïve to think that companies are unaware of this. I think they actively encourage this outrage-fest, because it increases eyeballs. We are paying a heavy social price for a flawed advertisement revenue model.
You can look up the documentary on Cambridge Analytica. The logo _most_ prominently displayed the CEO's office is that of major Indian political party. And that party is not even the top dog in this game.
WWIII has already started - but its "hearts and minds" but with Corporatocracy and with covid being the opening salvo to drive fear and socially engineered behavior into the global populous.
You cant control 7B people without first taking over their minds.... (emotions and behaviors)
It's not a "movement". It's information warfare enabled by the fact that most information sources online don't even give lip service to the idea of separating propaganda and manipulation from honest public discussion.
The Russians are (obviously) getting very good at this, and other countries like China aren't far behind. Until companies like Twitter, Facebook, Reddit, and others recognize that protecting public discussion from interference isn't optional, you can expect this to continue.