Trump supporters have one thing in common

There are all kinds of Trump supporters. I have been trying to figure this out for a while. How can someone be what seems like a good person but vote for Donald Trump? There are good people who vote for Donald Trump. And there are really bad people who vote for Donald Trump. There are doctors and people who work at McDonald's. They have all voted for Donald Trump. So what do all Trump supporters although they may differ have in common? They are all stupid and ignorant. You can be a good person a doctor a professor at a university but still be a stupid and ignorant person.