Most people do not believe that, even when denying climate change or the age of the earth, that they are 'denying facts'. The problem is that they think that the word 'fact' refers to information consistent with their emotional preconceptions instead of consistent with provable reality.
It is also true that there is no source of information that everyone agrees upon. That's because most of the people in this country are emotional lunatics. They are the people taht used to be kept in the social role often referred to as peasants.
The kings and dictators were able to organize resources and enforcement structures to keep those who were trapped by emotion and stupidity productive because they were, mostly, people who understood facts to be consistent with provable reality and had the intellectual wherewithal to act on them.
In the 1400's, human rights started being a thing. In England, that made it so that they could no longer simply execute troublesome peasants. The solution? Ship them to American.
They are your grandparents.
As with any genetic cohort, there are plenty of people who don't breed true and so had children who were not dominated by their emotions. Also, lots of people who were able to use intellect came here to exploit the less rational people.
So, we end up with a country that, if you take both Trump and Bernie supporters together, comprises a 70-30 split of emotion and anger based idiots vs people who intend to think real thoughts based on provable fact.
We are fucked.