Bernie is just a little overly alarmed about The Donald.  At this juncture, whether he wins, or not, cannot be blamed on protesters.  And to quote MLK, "There comes a time when the cup of endurance runs over, and men (Ed. And women) are no longer willing to be plunged into the abyss of despair. I hope, sirs, you can understand our legitimate and unavoidable impatience."