wait, what? puerto rico is 75.8% White, so i don't know what this is supposed to mean? and why should race have anything to do with infrastructure? weird.
As a Puerto Rican.. Trump is right, our infrastructure is terrible and the government is a delightful mix of incompetence and corruption. By white I hope you mean "anglo" because puertoricans come in literally every shade including white (we were colonized by Spain). And PR has been flirting with rock bottom for years now, sad that the hurricane hit us, we weren't ready.
So they're mad that he knows how awful Puerto Rico's situation is? How does this blame them? If Puerto Rico was white and Florida was not, they would say that he only gives sympathy to white people and not enough to others.