I agree with you, Lil - all these things can be seen in the bible and in religion. The name of God has been shamefully misused for millenia as a way of controlling people. But that doesn't mean that is what God is really like, that just doesn't follow. All that tells us is that men are manipulative b***s - no surprise to any of us surely?!
Aloha - I am trying to answer you're question, but it is taking a long time to get my thoughts together! The difficulty is that we seem to be coming at this from completely different positions - I don't just mean that I believe in God and you don't, I mean that what we each mean when we say or hear 'God' is completely different. To me, God is by definition what is completely good. This is my starting point now, and so for example I come to the conclusion that those bits of the bible that show God to be a nasty vindictive piece of work are not 'God speaking' but people speaking for much of the reasons lil outlined below. When I was first converted (very much a sudden thing - a sudden realisation that God existed - which takes me on to the experiential point, I'll come to that in a minute), I 'knew' God existed but wasn't at all sure that I liked him, for all the reasons you say. It may well that God exists, I thought, but that certainly doesn't mean I'm going to worship the git. The difference for me was coming to an understanding of Jesus and becoming specifically a Christian, not a deist. If Jesus 'is' God - that is, is what God looks like to the extent that God is analogous to a human being - then I'm sure we'd all agree (everyone seems to so far anyway) that that is a good thing - Jesus was a good teacher, a caring and compassionate person, etc. etc. Not vengeful, uncaring, cruel at all. So then God as revealed to us in Jesus allows us to test the authenticity of previous revelation about God in the Old Testament - is it consistent, because if not it isn't the same God its talking about, so not talking about God at all. Does that make sense? I don't mean you have to believe that, just that that is how I see it. I quite agree with you that the sort of god you describe is not good at all, and I certainly don't love such a God. If I get to heaven and find out I'm wrong, and that's what he's like, I'll join you in rejecting him, as I said before.
But the point someone else made is important here - what about our own experience? As I said below, it is our experience that makes us take the bible seriously anyway. I was certainly converted by my own experience of God - and good things flowed from that amazingly. At the time I was sleeping around and the whole situation had got really messy - I was in a small college so everyone knew everyone else and it was getting to the point where noone was speaking to anyone etc. Anyway, one of the people involved was a Christian and I ended up doing one of those agnostic prayers ; 'dear God, if you exist, as X thinks you do, so maybe you do for him if not for me, oh I don't know, anyway, if there's anyone out there, HELP!'. Immediately I just had the most certain feeling of God being there. Its impossible to describe it - I didn't see anything etc, but God was there. From being so agnostic I was almost entirely atheist, there was suddenly no question that God existed. As I said, I was not at all pleased about this - in fact I said out loud 'Oh no, f*k off, you're not supposed to exist!' and spent the next few weeks feeling dreadfully guilty that I told God to f*k off. It lasted maybe half an hour, then I fell asleep (I'd been in bed). The next day, suddenly the situation with all my friends/enemies was transformed - teh girl whose boyfriend I'd been sleeping with came round for a friendly chat and forgave me without me even asking her to, and it was almost as if the whole mess had never happened. And I started going out with my now dh! Certainly makes me feel God is good, but I wouldn't want to push that too far because obviously some people have really crap lives so what does that say? I DON'T KNOW! I don't want you to think I have all the answers (mind you if you've read all this thread you know I haven't...) - the issue of why there is suffering in the world is one theologians have wrestled with for centuries and there is no really satisfying answer. We just have to learn to live with the question, and I don't mean just accept it - I keep struggling with 'God, WHY???', and indeed the bible is full of people doing just that (see the psalms for example). I can go through the different answers people have given if you like, but it'll probably jsut annoy you... and I'll have to look up my degree notes!