You didn't have to be part of the hippy movement to be a liberal. Plenty of them around that weren't hippies. You need to be more precise on what killed our culture in this country.
Bluesman is a "topographical" poster. The more you say, the less he retains. So I posted very generalized.
So you asked so I will say.
1) The liberal social programs of the late 1950s-1980s that completely destroyed black American families and developed the welfare/ white trash populations and homelessness. Liberals, as they often do, develop programs that destroy the target in the name of saving them. And what they did to blacks by segregating them by the millions into housing projects - built carefully away from white neighborhoods - (and jobs) and then giving them just enough money to survive so no need to work. This completely removed the need for males to be responsible. So the result was 70%-80% fatherless children, feral young males that formed street gangs/drug addiction and crime. Effectively the Democratic Party utterly destroyed blacks for generations, and sadly, generations to come.
2) Modern feminism. Not to be confused with womens suffrage and womens rights of 1920s - 1960s. These two movements dramatically improved the lives of women and got rid of treating women as 3rd class citizens.
Modern feminism is, again, like so many liberal platforms, destroys the very people it sets out to "save". The first thing they did was to convince young girls of the 70s that their mothers were unhappy, unfulfilled and treated poorly. That a "stay at home mom" is wasted potential, and bowing to misogyny. Women should all go out and work like men. The result of that was the crushing wage stagnation of the 1980s-2010s. This also lead to latch key kids, higher divorce rates and increased dependance on debt as income as wages fell flat while people's materialism exploded as people artificially sought to get "what they deserve" for working 60 hour work weeks.
3) The sexual revolution. This led to unprecedented increased cases of forced rapes, the abortion pandemic and kids having sex.
That is a good start. I don't want to write a book.