You ask an interesting question.  May I simply suggest that not all human behavior is rational; in fact, as I look around at what we do to each other and to the earth, sometimes I think we're more likely to behavior in irrational fashion.  ...and, yes, I consider supporting that a man who, all his life, has demonstrated the moral values and emotional instability of Donald Trump, to be irrational. 

After the acquittal of the officers who beat Rodney King, inner city Blacks in LA burned their own neighborhoods and looted and destroyed businesses owned in many cases by other African Americans.  In my opinion, their"blind anger" fueled irrational behavior.  Our history, as the history of all nations, is ripe with examples of various types of irrational "mob" behavior.  

IMO, the support of Donald Trump as a Presidential candidate reflects a widespread disillusion with the "status quo" in peoples' lives.  It seems based on the belief that America is "going to hell in a handbasket"  (con.)