It's worth bearing in mind that the US is a much more racialized society than the UK. We don't think of 'Mexican' or 'Muslim' as racial categories. But they de facto are racial categories in the US. That may not be very logical, but then neither are most Trump supporters. How many of them do you think are able to carefully parse the distinctions between 'Latino', 'Mexican' and 'illegal brown person'?

And of course, racism very often comes wrapped up in other prejudices which are thought (rightly or wrongly) to be more respectable. All of the groups Trump has targeted are groups that just so happen to consist mostly of people who aren't white. They're the groups that, in the public imagination, are responsible for the loss of an imagined homogenous White America.

Trump can't say "I want a white America". But the people who do want this haven't had any difficulty picking up on his hints.