It's not too hard to understand Trump's appeal or the right wing racism. Things are shit right now, for everyone except the rich. Black, white, Mexican, whatever, we're all eating shit right now.
So since that's the case and undeniable and we're all feeling it, you have to look at why. Everyone knows that the money they deserve is not the money that they're earning, and the question is why. The first, obvious, and correct answer is that wealth inequality in this country is retarded and there's a massive wealth concentration gap at the top, which is comprised of a growingly more exclusive club that does not want you or anyone else in it.
But it's really fucking hard for some people to deal with the fact that the American Dream, if it ever existed, is virtually impossible nowadays, and that the things they grew up believing were always horseshit, like if you work hard and are dedicated to a company you'll be rewarded with raises and promotions. You can't believe the people at the top are bad, because that would be admitting that the system is rigged.
So the second, obvious, but incorrect answer is that someone not ABOVE you is causing you not to get your way, but someone BELOW you. So if the CEOs can't be blamed, then it must be some sort of criminal element that's causing all the problems. We've tried this plenty of times, the native Americans, then blacks, then Japanese during world war 2, then blacks again, and now Hispanics. It was never true then and it's not true now, but that doesn't matter because it's EASY.
Trump just tells them what they want to hear in a way that's kinda entertaining. They already believe this shit, they just want someone to come out and say it.