It’s easy to understand the intolerant nature of ideologues–that’s what id essential to their schtick.
A True Believer is first and last–intolerant.
It is the nature of academia to be intolerant and have intellectual passion. The next step is censorship.
The Liberals need their cause and they need to know they are right.
They also have no desire to really solve the problems of their favorite objects of pity as eloquently discussed by William Voegeli.
Here is a great essay on the totalitarian nature of well-meaning socialism, particularly in the academy.