And then there is Richard Dawkins, who launched an ad on London's busses reading: "There is no God!" when the Pope visited the city.

I think there is a difference between agnostics and atheists, where the latter are convinced of the non-existence of deities, finding evidence for that all over the world and the human history - most often pointing to the suffering of innocent people and asking how a God could allow for that. But even within the group of atheists there is a special one aggressively fighting religion in public life. Of which Richard Dawkins is a prominent member.