Does it being said in anger make it any less applicable?
The definition used in someone's essay means ass all to me. It's he definiton uaee by the common man, if you'll excuse my microaggression.
It's usually used to quash disagreements. As in "check your privilege." It's often used as a way to categorically exclude people from a discussion, and this sense is the "angry" sense. So yes, it's less applicable because it's used as a shortcut to avoid forming a real understanding with someone else.