The reason the student protests of the 1960s didn't lead to political correctness was precisely that — they were student movements. They didn't have any real power.
I don't know what Graham thinks 'political correctness' would have looked like in the 1960s – most Americans still thought women's lib was a joke, many Americans were fighting to preserve segregation, and nobody had heard of such a thing as a gay rights movement.Ernst Röhm, leader of the Nazi's SA forces, was gay. People did not join the Nazi movement because of the impeccable life style of their leaders, but their political program. Same with AfD or Trumpists.
>Röhm's appointment was opposed from the beginning by some in the SA who saw it as cementing the subordination of the SA to the Nazi Party's political wing. His homosexuality was seized upon by those who disagreed with the organizational reforms but could not openly criticize Hitler without breaking with Nazism, because of the Führer principle. Hitler said that the personal life of a Nazi was only a concern for the party if it contradicted the fundamental principles of Nazism. The leader of the Berlin SA, Walther Stennes, rebelled against the SA leadership and declared that he and his followers would "never serve under a notorious homosexual like Röhm and his Pupenjungen (male prostitutes)". On 3 February, Hitler dismissed Stennes's objection, stating, "The SA is not a girls' boarding school."
In case it is not obvious from my original comment, I am not trying to paint Nazi party as a beacon of DEI. The Nazi state went on to murder thousands of homosexuals. But in response to the OP, Röhm was certainly not closeted and it is doubtful that his homosexuality could even be described as an 'open secret'.