(shrug) I'm with you, for the most part. Like I said, my argument wasn't really directed at whether Dawkins was helping or hurting by being the way he is, just that this particular comment regarding the book wasn't very provocative and that the question was colored by the professor's own beliefs.
Though I will say, you could argue that due to the nature of their beliefs, very few/no Creationists would listen to Dawkins anyway. He probably means to target those who are unsure, and don't believe one side or the other firmly; by belittling the other side, he hopes to lure them over to his. It's not classy, or anything, but maybe it works. (shrug) How can we tell?