Staying on the art comparison; how do you know which is original work by the artist and which are fakes?
What you're basically saying is that the number of dots you need to connect between you witnessing anything supernatural and the following the morality as taught by the Bible is so staggering that there's no point to even bother? At every leap of faith the nodes that connect the reasoning have an almost infinite number of connections both to and from it? or what? How does that strengthen any case for the supernatural? You're basically saying that because we can't use logic we shouldn't, and just take the leap of faith anyway, right?
What I don't understand is why this seemingly compulsive need to connect the belief in an omnipotent god with the moral rules of the Bible. Why not treat them as two different entities? Why not judge the moral system as one unit on it's own merits and the supernatural claims as a separate unit? Are they in any way connected? Is the only reason to follow the commandments of the Bible really only the fear of punishment in the after-life?
edit: hmm....after some pondering I'll have another go. I think that the logical error you are doing is that you seem to assume that you have to have a faith. It's not like there's insulated areas of faithlessness between theories. There isn't. It's possible to use your approach if Christianity is a cohesive logical system that is connected, and if you remove parts of it the whole theoretical structure collapses. In instances like that finding enough evidence to support part of it can be used to support all of it. But there's nothing cohesive about Christianity. Each and every part is a separate statement only supported by itself. An example is the creation. The Bible said that god created the universe. Ok fine. This can be correct and the rest of the Bible wrong. Or the rest of the Bible can be correct and that could be wrong. Rejecting part of the Bible doesn't mean you have to reject all of it. In the same way. Just because you accept a part of the Bible doesn't mean you have to accept the rest of it. We all know that the Bible is quite a compilation and has been heavily edited through the ages. It's not like the Koran which origins we know.
Why not keep Christianity as one of your favourite theories? You where the one putting all that effort into agnosticism. As you so vigorously defended, picking one specific faith is not only a huge leap of faith but defies logic. Why not have a few favourites? Why not pick the parts that you think make the most sense to you and drop the parts that you find are ify?