If you are unable to see how recent rhetoric around immigrants fits historical patterns, I'm not sure how I can help you. Also, you talk about "the rules" as if they had nothing to do with America's history of racism, but historically it's pretty clear they do.

It is true that plenty of non-white people come legally to the US. But that doesn't mean that there aren't problems with how those people are treated, or that there isn't bias against those people involved.