You are right, and this is because of how social media works. Compare our discussion here on a forum to how Facebook works for example. On this forum, you see all posts. You see all opinions. You see the "group mentality" even though it is mixed with many different thoughts. You could filter some of it out by using the ignore feature, but you have to manually chose that. On facebook, that filtering is done for you. It automatically presents you with things it has learned you like. It does that because it wants you to come back as much as possible, and they know you will come back the more you see stuff you like, and less of the stuff you don't. So all these QAnon people are seeing their social media feeds filled with positive opinions about what happened yesterday and are completely isolated from the massive outrage the country is having as a whole. They are literally in their own little world right now, and have been for years for some of them. Which is a big factor in what led up to this happening. Many of the people there yesterday experience a social media world where everyone wants Trump to be president, because that's all they see in their social media feed. The election had to be stolen, because they don't see anyone wanting Biden.
It does go both ways. Those who want Biden are overwhelmed in their social media feeds with pro-Biden stuff. It was just a matter of time before one side snapped as a result of this. I don't have a solution to social media on how to fix it, but it clearly is a problem that is destroying our democracy. But make no mistake, the QAnon movement did not die from what happened at all yesterday. They seriously and literally live in their own world.