This is the best EVER from the columnist: 

"According to studies of U.S. universities, 18 per cent of social-sciences professors say they’re Marxists. Only 7 to 9 per cent identify as conservative." And, um, the other 73%?   Like, the overwhelming majority, you mean?  Columnist doesn't say, doesn't know, but it's an ideological state of emergency? In another country, btw.  It gets better: "Social sciences and humanities make up only part of universities, of course. Other disciplines – engineering, physics, B-schools – are relatively apolitical." So, that's evidence that any 'problem' is dangerous and out of control?  18% of social scientists on the whole, who are collectively a tiny group in the bigger university, are (wait, hide your children...) MARXIST!  Plus, um, columnist, all of our positions are political in some way. That's Social Sciences 101 stuff snd a very obvious common sense insight to boot. 

It's free speech, minority opinion, and academic freedom. It's okay, breathe.