Trump speaks Fluent CAC. Some of these guys were politicians, obviously racist, but even with the dog whistles, they often speak in a language that CACs couldn't always comprehend.
Trump makes it simple "Mexicans are going to rape your daughters, black people are from shit hole countries, and I'm keeping nonwhites from fucking up your white Suburban life". He speaks perfect, fluent CAC. This is how they speak to themselves. They might not get some of the racist but still very political rhetoric of a Ran Paul. They understand what Trump is saying. Trump is like Shakespeare of unfiltered racism and they love it.