In fact, it's the argument that one can't prove god doesn't exist that I referred to as sceptical. I am an atheist. The central tenet of my own athiesm is not that God does not exist so much as that there is no evidence that he exists. There's a subtle but important difference.
As for the bible, you can't deny that some of it has been regarded as literal truth by the church, and then regarded as metaphor when the social context changes. This seriously undermines its authority. Of course, that doesn't prevent somebody from taking a message from it (whether it be, 'gay sex is wrong' or 'love thy neighbour') but the message necessarily lacks objective substance.
Also, if you dislike the anonymity of the internet, why not use your real name?
"If you've already made up your mind, there's no point having this argument. All you are really seeking to do is either to attack our faith and make us feel bad, or to trumpet what you regard as your own superiority over us poor misguided sods."
I agree with you there. It's true that some atheists, such as the aforementioned Dawkins, are curiously intolerant of religion. I'm certainly not trying to make anybody feel bad about himself, though.