By your measure, Americans are incapable of self-government.
For many that would be an accurate description, and not just the twits running around spouting socialist nonsense and evidencing magical thinking that once they tear down what is here somehow a new society of kindness and fairness will pop up.
(Consider this: https://www.heritage.org/political-process/report/regurgitating-the-apple-how-modern-liberals-think )
The Cultural Marxists have done their job well. So too have more than a century of race grievance pimps, already a thing to be described by Booker Washington at the dawn of the 20th. Likewise too many people have been also conditioned to be entitled and hold out their hands, not to the Lord but to government. The list goes on and on.
Even discounting the Left for which nothing of the old extreme Left is extreme to it anymore (which is why Sanders doesn’t have to pretend he’s not a Democrat anymore) you still have people who love the benefits of Arbitrary government derived from FDR’s lawlessness. Who think they’ve a right to see others defrauded of their means for illegitimate benefits simply because they were already similarly defrauded to give illegitimate benefits to others (entitlements are the proverbial gateway drugs for Arbitrary government).
In every respect this nation has dry rot everywhere, arguably no town or community is free of it, and what remains that might otherwise be sound and trustworthy is undermined by said dry rot.
The falling away is also happening already, and for evidence I would point out that the fruit ascribed to lives that have been turned over to reprobate minds is very common in this culture. Indeed, mere perversion without madness is yesterday’s news given the rise of genderism.