@ossobuco,
Just as Norman Mailer often spoke out of his ass, so it is with Hitchens. He can be a flaming embarrassment to a worldview, just like Richard Dawkins can be someone that many biological scientists would love to shoot in the head to shut him up.
However, he does compoe a thought on line so well and his first draft attempts are better than most other authors final copy.
Hitchens does a W F Buckley stare and drops his tone an octave when he makes a point. This is something he picked up in acting school, Im certain.