Not saying "all Trump supporter are bigots". I know quite a few people I consider friends and they support Trump. They are conservatives and feel he is the best choice (something I disagree with, he isn't a conservative in any way). Add to that the "never Hillary" people. That is a big chunk of the nation.
And then there is the nasty part of our society.
You see something at Trump rallies that is awful.....and more prevalent than I thought. They are some messed up folks in this country and he brings out their venom. They aren't necessarily Republican or Democrat. The are just hateful based on race, religion, or sexuality.