The Hitch was always a thorn in the side to religious pomposity as personified by Cumfart and his cronies but he was more than capable of standing his own corner. Now he's unable to defend himself, he's seen as an easy target. As for Prof Dawkins, he's British and well spoken, not to mention eminently well educated. They don't need much more of an excuse than that.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'