Regressive student unions have been very busy in recent years suppressing free speech or opinion that they have arbitrarily determined to be offensive. 
And it's all made easy because thanks to identity politics we've all been divided into neat little boxes - a victim all-sorts - so you can always find someone who'll be offended.
Realizing that whites couldn't be allowed to hold victim status the regressives went ahead and invented a silencer they call 'white privilege'. 
Looks like some white students at Dalhousie aren't buying it. 
They claim that they have been "offended".
Ms. Khan admits she might have been nasty but claims free speech. 
Oh the irony. 
Perhaps someone could enlighten Ms. Khan on the concept of "what goes around comes around".