It's ironic that a group of well-known writers, scientists and comedians should express their unhappiness with the Prime Minister's characterisation of Britain as a "Christian country" in the form of a jointly written letter to a newspaper.
Such letters implicitly exploit the authority conferred upon celebrities in contemporary Britain, demanding that a point of view be taken seriously for no other reason than that it is held by a large number of famous people.
Of course, these aren't just any common-or-garden celebrities, they're also members of the liberal metropolitan elite, which makes them morally as well as socially superior – a kind of secular priesthood.
Little wonder, then, that they object to Christianity being praised by David Cameron. Any traditional form of morality – anything that suggests there might be a higher source of authority than them when it comes to matters of right and wrong – is a direct challenge to their status.