The madness of the 60s slowed down as:
Civil Rights laws started to be enforced
Public School integration (busing) went into effect
Housing discrimination laws were written and enforced
Redlining by banks was stopped
Equal opportunity protection in hiring and college admissions
ERA became part of some state Constitutions (including NY and CT)
Voting age and national drinking age lowered to 18
The Viet Nam War ended in the mid 70s and minorities ceased to be conscripted and used as cannon fodder, while the wealthy such as President Bone Spurs could buy their way out by paying a friendly doctor.
Outside NYC, white flight brought Jews to the suburbs. Unlike the 1920s and 30s, now their money was welcome by home sellers
The protests of the 60s and 70s were not anti-government as they are now. By and large they were anti-war/draft, pro civil and equal rights for females, pro-abortion and birth control. These laws changed and the country moved on. Now the media exposes every bad action of a cop and the people react. Far different than when there was 15 minutes of national news on TV at 7PM. The first anti-Viet Nam War demonstration I attended in New Haven was largely white middle class people who were horrified by the body bags and nightly death toll being shown on the supper hour news,
There was no general fear that the USA would not continue. Now there are calls to remove the President and his cronies by force. I don;t believe it will occur. I think he will be removed at the ballot box.