In addition to his statements and discriminatory behavior already noted, one can infer Trump's racism from a variety of his other comments, such as what he said about Judge Curiel ("He's a Mexican.") and about Mexicans ("They’re rapists . . . And some, I assume, are good people.”), sentiments that he soon extended to all Latinos. In 2015: "And if you look at black and African American youth, to a point where they’ve never done more poorly. There’s no spirit.”
These are the assertions and behavior of a racist.