Indeed, at what point do we compel people to respect fact, and how do we do it? We have allowed to come into existence an environment where people steep themselves in heavily-biased, often non-factual narratives, where neither they have the responsibility to conform them to reality, nor can the people who peddle them recklessly for profit be held accountable.
In this instance, I think that a mutli-pronged approach would help. First, people on all sides of the aisle need to condemn in a real manner what happened, not just on Wednesday but also in any of the riots that have happened. Condemn not just the acts themselves, but the actors and the message. They also need to acknowledge that while the actions are wrong, the feelings that people have are genuine, and that the issues need to be actually listened to, not just given lip service. For example, I think that an actual, bipartisan, as objective as possible panel on voter fraud should be implemented as well. This would help quiet those on the right who are upset, and could also lead to progress in terms of providing suggestions and systems to make voting even more secure than it already is. I also think that the Democrats need to resist very strongly trying to swing the pendulum too far, too fast. Moderate, centrist language and actions, especially at the beginning, are what is needed.
We know that a fact-based argument by itself doesn't work for those with strongly-held convictions, especially those that are fear-based, as many of these are. There needs to be more. Not to get too touchy-feely, but they need to feel heard and validated, not dismissed, and helped to find their way to actual truth, not just told how wrong they are. There will always be those who won't listen, but for those that still are willing to hear the other side, the techniques of persuasion can work.
Although I don't see it happening, if the media on all sides (I'm not including the radical ones) would call out the lies, exaggerations, half-truths, etc., and those in power would do the same on their own sides and colleagues, then trust could start to be rebuilt. However, I'm a cynic, and don't see that as likely. Instead there will calls for retribution/revenge, grandiose speeches and over-promises, vitriol and invective, and not nearly as much progress or healing as the majority of us would like.