Google the recent article in the National Post "Universities should make people think, not spare them from discomfort" 

It is about how the left has attempted to restrict dialogue so narrowly that free speech is almost impossible. 

To quote: 

"If you can’t speak freely, you’ll quickly lose the ability to think clearly. Your ideas will be built on a pile of assumptions you’ve never examined for yourself and may thus be unable to defend from radical challenges." 

A perfect description of the intellectual "cul de sac" that results in shallow, thoughtless articles like this one.   The author is quite justifiably being taken to the cleaners in this blog.