Unfortunately, Trump has set the tone for the way people with very different points of view interact with one another. He is a pathological liar who regularly contradicts himself and he has convinced his base that anything he himself brands "fake news" is just lies to bring him down. I loved how, when forced, he had to admit that Obama was, in fact, born in the U.S. Actually, he didn't "admit" it because he thinks he is never ever wrong, but he announced it like it was breaking news.
Let's be real here, many, not all, but a very large percentage of his supporters are racist. These folks could never accept the fact that we elected a Black President (even one who is half White).