Because it's 2017, or because it's 1984?  An academic advocating for thought police, of all things.  Who gets to decide who is "right" and who is the other side"?

It's impossible to reason with alt-left SJW's, anarchists, eco-zealots and ardent followers of just about every religion too (not to mention ardent followers of political parties).  Why aren't these on Kingwell's list too?  Perhaps in a future article?  I doubt it.  

I don't know what's more scary...that these other forms of expression could become censored too, or that they wouldn't.  At first blush, the goal seems not to suppress communication of all enternched perspectives...just the ones he disagrees with.