I think of Christopher Hitchens more along the lines of Katha Pollitt, who “want[s] to complicate the picture even at the risk of seeming churlish.” And she does. Still, Hitchens was sometimes spectacularly right, as in this introduction to Arguably: Essays:

The people who must never have power are the humorless. To impossible certainties of rectitude they ally tedium and uniformity. Since an essential element in the American idea is its variety, I have tried to celebrate things that are amusing for their own sake, or ridiculous but revealing, or simply of intrinsic interest. All of the above might apply to the subject of my little essay on the art and science of the blowjob, for example [….]

Be almost as wary of the humorless as you are of the people who pride themselves on humor.