Icon, in answer to your query to me, I'd like to think everyone had abandoned those old race-based notions by now. I prefer "ethnic" but that seems too academic for some people.  Not to get bogged down on terminology but  you can define me as a "race constructivist" if you must label me.
Naturally by "white" I'm referring  to an ethnic group socially defined as "white", so we could use the term "SDAW" or "Socially Defined As White."  If you saw me you could label me a SDAW. By the same token, we could use the term "SDAB" or Socially Defined As Black for those folks who are being stereotyped by blackface. (Not "black makeup")

Beyond the terminology, my point was that a small group of students wanting  to see this tenured prof fired   for wearing blackface  (impossible)  hardly comprise a "lynch mob" and to even make such a comparison suggests a gross misunderstanding of American history-- see those postcards to see what SDAW did to SDAB in real lynch mobs.