Very interesting body language in the faces, there.
Haggard showed the condescending certainty I have seen in so many people preaching with their ears closed.
Dawkins's eyes reflected two things: that he was listening (also as evidenced by his saying very little, but replying with substance), and a rapidly rising level of irritation. Those fast blinks showed a man who was struggling to control his anger. I would have liked to see the rest of the conversation.