As it is a criminal offence to threaten someone with violence or death, the letters are being taken seriously, and Pullman is expected to be accompanied by bodyguards when he appears at the Oxford Literary Festival on Sunday.
Those who taken an interest in that side of religious belief that justifies harming or murdering those with different values may remember the writers and producers of Jerry Springer The Opera having to leave their homes for police protected safe houses when they were similarly threatened. In that case too, the Christians had not let seeing the show get in the way of deciding it was blasphemous. Of course, the trouble with reading the book or seeing the play is that you might, God forbid, change your mind.
But that's where faith comes in. You don't need information or insight when you have faith. It holds firm no matter what. That's why it's called faith, and not reason.