Glenn Greenwald examines the rules of commencement address civility:
So, to re-cap the rules: (1) When a pro-war politician gives a pro-war speech as part of a graduation ceremony, and students in the audience heckle and boo him, that shows how Deranged the Angry Left is — because they heckled a pro-war speech. (2) When an anti-war politician gives an anti-war speech as part of a graduation ceremony, and students in the audience heckle, walk out and even riot, that also shows how Angry the Left is — because they “provoked a near riot” by pro-war students.
Yes, that sounds about right.