I was a convert to Agnosticism from two religious parents, so my personal experience that there is a lot of resentment and aggression upon realizing that you’ve been fed a load of dogma your whole life. I think a lot of this has to do with the fear of Hellfire that is inculcated in every ‘Christian’ child. To combat this fear, I delved into the arguments of atheists such as Dawkins and Harris in an attempt to prove to myself that such a fear was unfounded, and I became angry that such a flawed belief system was able to inoculate itself from criticism. It’s a bit like a political ideology in that way.

Over time, fear is replaced with righteous anger and this gives way to some form of boredom with the whole affair. At least for me. I expect that Dawkins is perpetually in the anger stage.