I believe that the 60's hippies are who these people are addressing. You've seen the Grandpas with the ponytails and their wives trying to look like they did in the 60's.
There is a pervasive immaturity in American society. People just do NOT want to grow up.
Just look at the magazines, films, tv shows, advertising...etc.
To watch this stuff, you’d think everyone in the US if under 35.
I had to quit listening to the radio because those clowns talk like everyone on earth is 12 years old!!