How did we arrive to this point where a huge chunk of the population is in one reality and another huge chunk of the population is in another reality? Segregation of information sources? Politicization of media outlets? Self-reinforcing social bubbles? A combination of all of them and more?
At this point, even Trump telling people to stop (which, to his credit, he has) will not help, in the same way that democrats telling Antifa to stop will not help (I mean Biden has asked them to stop for months now, and they're still launching fireworks at the courthouse in Portland to the point the mayor is now begging for federal help).
Political violence has been normalized by the media (both social and not) to the point where, even popular politicians who disagree with the mob will become its victims.
The scary part is that some people perpetuated all this polarization and rage for money.