It was easier to build a narrative in the 60s. We know, in hindsight, it was mostly a false one. Nobody had any easy way of verifying that, though, so it seemed more unified.

The Kennedy's started showing where the breaks in various labor movements and parties where in the Unions that got pissed about their justice reforms. Politics was more about financial work and security and wealth, not so much about justice. It culminated of course, in the assassination of Kennedy and then kept on rolling through other Kennedys.