I've heard secondhand from people who took his class while at Princeton, decades ago, that his courses even then were notoriously and anomalously hard in compar

I've heard secondhand from people who took his class while at Princeton, decades ago, that his courses even then were notoriously and anomalously hard in comparison to organic chemistry courses at other Ivy League universities, and in comparison to other courses within the department. They're alarmed that this has become a "culture war" issue. If there is a culture clash, it is that the "gen Z" students finally organized and collected evidence to back their claims that his teaching was having negative effects beyond those originally intended by the institution, and were not afraid to take it to the institution. That's a good thing, in my book.