For John, BLUF: It is better to keep your mouth shut and be perceived as a possible Trump voter than to open your mouth and remove all doubt. Nothing to see here; just move along.
The Professor isn't worried about the special snowflakes who need puppies to play with. He is talking about the "othering" of Conservatives and Libertarians. It is OK to wear a Che t-shirt, but not to have voted for The Donald.
Hat tip to the InstaPundit.
Regards — Cliff