In the years following WWII, Adolf Hitler was explained - and explained away, pegged and dismissed - simply as 'mad'. A parody of him as the 'Mad Dictator' even became a standing joke.
That was a travesty, but also clearly now a serious error of judgment.
Something much the same happens today with Donald Trump, who is explained and explained away simply as a 'narcissist'. That too misses the dangerous nature of the man, as 'mad' did for Adolf Hitler.
Worse, it misses what part everything else plays in making Donald Trump what he is.
