There's nothing wrong with the extant definition of racist.
His racism and for that matter sexism have long been on display. I could have provided many, many other links, but I was particularly hoping for the amusement of watching you try to paint Fortune Magazine (and the Fox News contributor who wrote the piece on Trump's sexism) as having a left-wing bias -- or are you just going to post another picture of a dog and try to change the subject again?
Do I know what's inside his head? No, of course not. The only thing we have to judge that by is what comes out of his mouth, and what actions he takes. And he quite plainly sounds like and acts like a racist and sexist.
Reality, facts, and evidence simply do not agree with you.