I read THAT article, and found that it neither affirms, nor refutes the claim that universities shelter violent revolutionaries.
The thing it says about education is that it’s harder to get into a college now than before. That is a change, but it can occur with or without also acting as a retirement home for “the shock troops” that was mentioned in GPs article.
The Birth of a New American Aristocracy: https://outline.com/4BXcWS