Trump just sent a message of empowerment to the White Supremacists.

He's angered progressives (including whatever radical elements exist on that poll).

He's blown the whistle, dropped the handkerchief, sounded the starting gun on ramped of dissention and confrontation.

What could be his intended outcome?  Martial law?  Selective prosecution?  Eventually become the grand peacemaker?  Demonstrate the fire and fury of United States power on Americans to show NK why they should be scared?  

Written history is often incomplete.  And there was the Civil War and the Civil Rights fight of the 60's.  But, aside from the Civil War, has the country ever actually been this divided, to this breadth and scope, and this dangerously?