In a more perceptive,  honest world, Professor Shurtz should not need to apologize for "hurt and anger inspired by this event" but rather be thanked for an enlightening public service. The negative feelings that she regrets were already deeply ingrained - just waiting, as it were, for any excuse to manifest.  Sadly, the racism and low self-esteem that underlie  all sides of such polarization are profusely abundant in our society.  Therefore to point a finger of blame at any one individual or act is both misleading and disingenuous. If only the participants in this tiny segment of a far vaster play could now step back a bit and view the "event" from a larger perspective.  Then the professor's intended lesson might yield some of the desired, positive insights and all of us devote more attention to improving our ways of looking at others.