The right wing exists to preserve existing power structures. It’s all inclusive to those who accept their place in it or fear disrupting too many of those structures. A black preacher may very well be a Republican because while he may not like racism he dislikes women’s liberation and queer liberation more.

It’s popular to reference the Johnson quote "If you can convince the lowest white man he's better than the best colored man, he won't notice you're picking his pocket. Hell, give him somebody to look down on, and he'll empty his pockets for you." But it’s important to remember that it doesn’t just apply to poor white people choosing racism over economic solidarity with poor black people. It also applies to some rich black people choosing economic solidarity over racial solidarity with poor black people. It applies to straight people choosing homophobia against their best interests (hell look at Blaire White).