If you took the beliefs of the people involved in the insurrection to be true, you probably would join an insurrection as well. They believe that an election was stolen and that democracy has been destroyed in the United States and replaced with some form of a deep state dictatorship.
Trump supporters believe this because they have been lied to repeatedly for years without corrections they found to be believable. How do we correct these firmly held (but false) beliefs?
We need to hold people who lie accountable. If a talk show host makes a claim that an election was fraudulently stolen, that host needs to be able to provide real evidence to support that claim in a court of law or face civil / criminal penalties for disseminating false information.
Many people on HN hate the removal of Trump from Twitter and Facebook, and the removal of Parler from AWS... but private companies always have the right to choose who they do business with, barring a very limited set of protected classes. "Big Tech" are private businesses that most conservatives would support being able to exercise their freedom to choose who to do business with, and Big Tech made the right decision in removing people and organizations from their platforms who have repeatedly tried to promote harmful lies.
Beyond holding liars accountable, we do need to do a better job of making the truth more easily accessed. Perhaps holding elections in some sort of open source / public format would help... then you could look up your own vote and the votes of your friends to confirm, and also double check the counts across the nation.