Hitchens is an off-putting commentator, often stretching to make a point on political talk shows. He reminds me of those overly bright kids in university who would break into a lecturer's speech, essentially saying, 'look at me, I'm brighter than the guy who is trying to teach you dumb bunnies.'
Dawkins argues from science; Hitchens is a journalistic pugilist who could take lessons from the late 19th c. orator who espoused agnosticism all across North America and England, Col. Robert G. Ingersoll. Ingersoll knew his subject and as well preached tolerance for all views- on the part of all parties.