I am one of Dawkins' most vocal critics on RF, so let me give you my perspective. I too was a fan of Dawkins since the mid 80's through the mid 90's. I think his concept of the meme is brilliant and eagerly read books as The Selfish Gene, The Blind Watchmaker, and Climbing Mount Improbable as they came out. I have said and still maintain that no one does a better job of explaining evolutionary biology in straight-forward terms than Richard Dawkins. There's no question that he's a brilliant man and I admired him greatly.
So imagine me surfing the web one day and coming across an address that he had given on the topic of religion. (This was circa '95 or '96 I think, tho I'm really bad with dates, definitely before 9/11.) Wow, someone whom I greatly admire talking on a subject of great personal interest to me - what could be better? I read the text wondering what interesting insights he might have, and to my growing surprise and dismay, what I read was a disdainful diatribe against religion. He cited the tendency for people to remain in the same religion in which they were raised and how this was "proof" for their inability to think for themselves. He was derisive and contemptuous, hardly befitting an academic presentation. I was confronted with the knowledge that a man whom I respected and liked had no such respect for me, simply by virtue of my being religious.
I was deeply disappointed, but we can't all see eye to eye. I did not think much of it again for another few years, until after 9/11, after which books like "Climbing Mt. Improbable" were replaced by titles such as "The God Delusion" and he was everywhere in magazines and on tv in an all out attack against religion.
I know very well how smart Dawkins is, which makes his blind hatred all the more disappointing.