yy greenheart. It's vital to employ context and interpretation on the text, because as you say the books are of different times, different genres, different audiences and authors. I do believe scripture is inspired by God, but that is not the same as saying I believe God wrote every word. I also like the way you say we interpret the OT in the light of Jesus - this is exactly where Christianity is coming from. Jesus didn't say we didn't need the OT but did say he came to fulfil it, so it's important to understand what he meant by that and how he interpreted it. it's always interesting to me that the first passage he applied to himself when launching into his ministry was Isaiah 61 which was all about setting the oppressed free and turning sorrow into joy. His manifesto was steeped in compassion and justice - and that's what I see when I look at the God of the bible. It doesn't stop me feeling uncomfortable with certain passages which appear to contradict this, but does help me to come at the text with care and attention to detail. I really love biblical hermeneutics :-)
As for your question Ollie about whether people of faith ever say to their dc there may not be a God: I've been thinking about this. I fully own that since my dc were born I have longed for them to know God as I do, simply because I feel that God brings fulness of life and is truth and love. (not at all to say they can't know good things without God, far from it, but let's not go there for this question!!) But we all want the best for our children, and if someone has a strongly held, experiential faith, then that parent would desire their children to know that too - as stateless does for her dd.
The problem with that would be if the sincerely held faith was harmful or oppressive, and I am fully convinced that my faith in Jesus is not; in fact, the very opposite. I experience as it as lifebuilding and liberating.
That said, this obviously informed the way I framed faith for my kids. But we were absolutely determined to give them free agency in any decisions they made; if they held to faith because of force then it would be no faith. The faith I know is freedom, and thus people are free to choose or not (hence free will... err maybe we shouldn't go there either) 
So where am I getting to: Yes, I wanted my dc to know Christ, and also wanted my dc to be free, questioning, autonomous people who decide this - or not - for themselves. Thus, there were times that we talked about the possibility of there being no God and admitting that we can never 'know' for an absolute definite (empirically speaking), and then talking about how it would affect our lives if there turned out to be no God after all. What if we died and that was it? We discussed this kind of thing, and talked about the fact that we would have lived good lives, just as many people without faith do, and there is no harm in that. If we ever used our faith to oppress others, that would be another matter, but I cannot imagine ever doing harm to anyone else, and believe that to be against my faith, and against the moral standard I believe we all know inside of us.
So yes - we allow for possibilities, and we weigh questions and challenge one another. I particularly love that DD is studying RE because we get some interesting conversations over dinner :-)