Congress adopted In God We Trust over E Pluribus Unum and added Under God to the Pledge of Allegiance in the 50's in response to the Red Scare and America has been pretty fanatical about it since then.

Radicals radicalize radicals.

Only stable conditions, equaliberiam or entropy deradicalize.

Social was a flash point. Large parts of society interacted for the first time. Echo chambers formed, energy level increase, radical leave the bubbles and new groups militerize in defense.

It made less sense to people out of the loop though. Nazis, antifa, police are raciest, lgbtq, Christian nationalism, socialism, etc. All of these ideas were subcultures that grew bubble online cause they could (much like the Arab spring), and the radicals that formed and took action made big moves from everyone else's ignorance.

The majority didn't have the means, and frankly still don't, to hold the concepts or ideas as unique groups so instead they mapped onto the two party system warts and all. Because "right wing" was Republican the opposing side told everyone "right wing" is Republican. So Republican had to either disavow or defend them, but when these groups wanted to act politically they had almost no choice but to fit in predefined parties.

Its been mostly good, that's the crazy thing, gay rights, trans rights, police reforms, the DoJ has how many anti trust cases going on now?, how unions are forming?, etc

why? because it's all they have left.

demographics are changing. their population is aging. their kids hate the way they live and move away.

I’m pretty sure that would be ex uno, plura