I don't think you quite understand the use of the terms "white male privilege" or "colonizers".  Neither are either racist, or pejorative.
They both represent macro, very real circumstances, especially "colonizers".
"white male privilege" would, fairly, be better termed social dominance privilege, but its use remains accurate, in Canada.  In other locations, it would be entirely wrong, as it would not accurately reflect the make-up of social dominance privilege.
If Ms. Khan believes she is right in her actions, I surely hope she never gets access to the levers of power.  One need not be in the socially dominant class in order to harbour, and utilize, racism.