Quite possibly.   He's a lecturer, teaching skills courses, but not a member of the clinical or academic faculties at the University of Miami.  Assuming he enjoys contractual protection for academic freedom (I don't know if he does), then he is protected from sanction by Miami for his extramural speech.  There is no evidence that he has been sanctioned, only criticized.  But in addition to being stupid and a provocateur, he seems to be a bit of a drama queen as well, claiming, without evidence, that he "will" be fired.  There's now a mock twitter account that captures this aspect of the melodrama well.

UPDATE:  Michael Froomkin (Miami) reports that lecturers are covered by Miami's academic freedom policy, which the university has not violated.  Professor Froomkin makes some other interesting observations about this melodrama.