The author of the article "Al Jolson in Blackface" is Douglas Wilson. But I think who wrote it is irrelevant. Good satire is good satire, regardless.
I do not blanket-endorse Douglas Wilson anymore than I blanket-endorse G.K. Chesterton, George Orwell, or H.L. Mencken. And yet all of these men write great satire, whether or not they have something stuck in their craw.