Democracy depends on thoughtful, nuanced compromise, like you and I are apt to do. Those who see only black or white are ego emotionalists seriously lacking in intellect, irrespective of what their IQ might indicate.
The weakness of a democracy is that the electorate is often loaded with these infantile types, whose rationale is buried in myopic, tribalistic impulses, hardly more refined than the day they were born.
Appealing to these airheads has always been Trumps “secret” weapon. It used to be that politically theses kinds hardly bothered coming out of the woodwork. Then along came Fox News and conservative talks radio realizing that there was money to be made by echoing and reinforcing their primitive thinking.