The Diploma Gap
wasn't able to find the piece from the Sunday Times online.
Anyway, the gist being that educated Americans are more deeply prejudiced against poorly educated people than minorities, LGBQ, etc.
Although there isn't another first world country that has such a huge and politically weaponized Cult of Ignorance either.
I'm sure that there are people who are snooty about their academic or professional credentials- or their money- like the Trump or Khardashian families who undoubtedly disdain all of their base.
But as seen here, most (not all, you know who I'm talking about) of the keyboard warriors aren't stupid, and maybe not that poorly educated. They've just chosen tribalism and resentment as their path.