There are a chunk of folks who have fallen prey to an alternative universe of falsity. They gobble up utter falsehoods as being true.
But, the "crazy Trump cult" segment doesn't get you 72 million voters. Nowhere close.
I do believe the electorate remains very tribal. But, there was more going on in this election to get that many voters to double down on 4 more years of Trump.
First, many voters supported Trump not because they love/trust him, but because Trump is their avatar -- the quintessential "middle finger ... Fuck you liberal woke elitist 'apologists for everything' arrogant NY Times latte lovin' assholes." Stated differently, these are voters who were voting against a political culture they despise, as opposed to voting for Trump (whom these voters recognize as a flawed President).
Second, many voters bought into the "They're coming for you ... they're coming for your way of life." This is the segment who fears AOC (and "socialism") is really the force behind the Democrat Party, and/or who believe that Black Lives Matter + the summer marches after George Floyd + "defund the police" is a threat to Main Street USA. This is the segment who in my mind, unreasonably believe that the defending the status quo is the whole ball game. I say this respectfully, but these voters may be voting from a bad place deep inside. And it is about race. It is not that such voters are racist, but that they have not been exposed to enough diversity in their life experience. I see this amongst my own family and certain friends. We are not a red state/blue state electorate. We are an urban/suburban vs rural electorate. Those who live in urban settings are exposed to much greater diversity, and hence, are less threatened by it. Urban dwellers do not see a "status quo" that needs to be defended. Many ask "OK, why did so many folks vote for Obama, but then voted for Trump?" My view is that these voters viewed Obama as the poor kid from the housing projects who finished first in his medical school class and develops a cure. He was their great American story. But, to this segment of the electorate, "let's not carried away." And hence, the pushback from Main Street, and the changed vote to Trump, especially after the marches this summer (many who just saw the marches as "riots" or "looting").
I also believe that the perceived polarization amongst the electorate is less than the actual differences amongst the electorate.
People are tired of the noise that surrounded the Trump Presidency. Biden will be helpful quell the stone throwing and identity politics because of his nature and his tone/rhetoric. The passage of time will help.