Wow,this division is back!
One could argue the philosophical division in American thought has always existed but has been exacerbated recently by technology.
It has been developing for a long time. Here’s an excellent take on the cause.
The Roots of Our Partisan Divide
https://imprimis.hillsdale.edu/roots-partisan-divide/
Years ago, every network had blue states as Republican, and red states as Democrat.
Then, the media and Democrats got together and had it swapped, because they feared that "Red" was associated with Marxism/Communism (which it is).
Even today, I simply reject the labels of Blue and Red.