Yeah, I'm sure there are holes in the following analysis that one could drive a tractor truck through, but here's my best shot:
The 60s and 70s were distorted by a cojoining of the Civil Rights movement and Vietnam War protesting and plus the first time inside the U.S. when college youth were NOT brought up short the elder generations. It was potent and real in nature to the protestors because the Blacks were LIVING the reality of either being relegated to dead-end ghetto existence or being war bait age . . . or both. The youthful White and Brown and Black hippies -- for instance -- could FEEL Uncle Sam considering their sizes for military uniforms. So they were committed to the -- um -- resistance.
Today, however, we have several generations already deliberately steeped in Marxist/Fascist leftist oriented ideology from kindergarten through college.
The biggest problems is that their own lives are not on the line due to a military draft during war time and not forced to live in ghettos or barrios with absolutely no way out. In addition 'feeling' the pain of others by a generation raised in the lap of luxury -- mostly the bored White youths in this case -- is more academic in nature for them than real. So in truth today's youth -- Black, Brown, or White -- are just posers and their hearts really are not into any real leftist revolution . . . especially those intelligent enough to realize what a 'successful' leftist revolution would do to their future lifestyles.