Demonstrating won't help. Here is a reasonable explanation why so many voted for Trump even if he is unstable and divisive: 

"It turns out that racial resentment was the strongest predictor of whether a voter would flip from Democrat to Republican. When you say Black Lives Matter, these white voters hear Kill a Cop. When you say diversity in the workplace, they hear special privileges for minorities at the expense of whites."  

The cure seems to be to get rid of identity politics, i.e.,  no differential treatment regardless of race or status.