By Paul Krugman, bolded below:
Just to be clear, there’s no evidence that Mr. Ryan is personally a racist, and his dog-whistle may not even have been deliberate. But it doesn’t matter. He said what he said because that’s the kind of thing conservatives say to each other all the time. And why do they say such things? Because American conservatism is still, after all these years, largely driven by claims that liberals are taking away your hard-earned money and giving it to Those People.