Because I don't really care. I haven't read The Atlantic in weeks. No time anymore.
However, if there is one thing I can say about the article, what bothered me was the conclusion. Hitchens mentions that it appears that capitalism and Marxism are symbiotic. This might appear to be true at first glance (after all, what's a revolution without something to revolt against), but Marxists have a vision for society after a capitalist state. Also, Hitchens uses evidence from the Austrian school to criticize Marx, but the fall of Milton Friedman's followers shows that libertarian economists shouldn't be regarded as economic heavyweights.