Of course it’s not just racism. You got to throw in sexism and other kinds of discrimination. This is not just targeting elderly white people, all this certainly it is targeting many of them. It’s also targeting younger white people, and men, for example.
The other thing we should never forget is that Washington is full of sleazy politicians. In 2016, Trump was campaigning as a reformer, and people were hoping that maybe he would magically address some of that corruption. Of course he didn’t, but he played on that hope, as reform candidates always do. And once people buy into him, it’s easier for them to stay bought in than it is to admit that they got played.