Trump is a prime example of how stupid American society has become.
All those years of ignoring educational system problems, ignoring stupidity in social media, etc. Has lead to an easy W for billionaires because Trump is the guy who represents them and he's done excellent campaign on how to attract every American retard on his side.
Hope all those small business rednecks have a backup plan when huge corporations get them out of business.
It has more to do with racism than pure stupidity IMO.
White America REALLY didn't like having a black president and we're still seeing the backlash from that. Combine that with fears about becoming the minority and the right wing media and you have a population that will knowingly vote for someone they know is bad just to screw over the people they hate.