The people who support Trump don’t actually support Trump’s positions. He’s ok with abortion, he is ok with tax increases, he’s ok with a single payer healthcare system. He’s from friggin’ New York City, for christsakes! A careful review of Trump will show that he is, at the least, a moderate, and possibly even a liberal!
But he’s also a bully who has no qualms about saying rude things to people. And he has enough money to get away with it without ever needing to apologize.
This, in my opinion, is why he has support. He appeals to people who (because of lack of education, opportunity, or personal legacy) have no power themselves. Their boss tells them what to do at work, their preachers tell them how to behave at home, news pundits tell them what to think about the world, and far more powerful people lead the social consciousness.
In short, they feel powerless. Which makes them afraid. Afraid that foreigners will take away what little career they have. Afraid that the government will take away their guns. Afraid that gays will make them queer.
And, while all of this is going on, they hear that other people (minorities) are deserving of “special” treatment (that is, respect and accommodation). Which makes them angry and resentful.
So when a guy stands up and talks down to the powers that be, he reaches that inner desire to tell all of the “special” minorities to go fuck themselves. And tell the people in charge to shove it. And tell the politicians that they are idiots.
They wish they could be that guy. They want to be powerful and important, and they want people to ask them about the important decisions of the day. Trump satisfies this angst…for now.
But if Trump ever has to talk actual policy, and give actual details, they will drop him in droves as they realize that he doesn’t really have their back. He’s a businessman with an international reach who cares about the bottom line. And when that becomes apparent, they’ll realize that he is just another bigwig who is telling them to shut up and listen to orders. And they’ll go back to being pissed off at the world, frustrated with their impotence.