Rudy Giuliani has just about proved to America that he had what it took to rid New York of its many unpleasant ethnics and poor people, as the Times explained this weekend. Did you know that everyone in New York was on welfare before Giuliani became mayor? It's true! Every last one of them, except the good people of Staten Island, which is kind of the Iowa of New York. Back in the dark days of the early 1990s, "a New Yorker couldn't walk up Third Avenue without being on the lookout for muggers, of the blocks of dirty book stores and prostitutes, of public urination and pot-smoking." Christ, it sounds heavenly! (Though the public pot-smoking thing is a little west coast for our tastes.) But if there was one man who could be counted on to rid this city of its criminals and perverts, it was that adulterous cross-dressing megalomaniac. And he's gonna do for the rest of America what he did for New York: protect it from aliens.