From my view, Trump did not reveal division; he revealed the corruption of the "ruling class" and how much the country was being sold out by the "ruling class".
He revealed how much we are constantly being lied to and manipulated by the dominant media.
Most of the "division" is between those who have been "red pilled" and know they are being lied to, and those who continue to accept the lies as truth.
It revealed how many people are suckers for the Deep State Propaganda.