Indeed…

… The Main Casualty of Canceled Trump Rally Is The *Idea* of Free Speech - Hit & Run : Reason.com.

Public debate, it seems, is no longer a means by which to search for truth, knowledge, and common ground, but only a venue for speech that expresses unthinking solidarity with whatever you already believe.

Precisely. No attempt to see any merit in an opposing. Merely dismissal of that point of view, because it opposes the one you espouse. Great way to have no dialogue