Theology Based On An Allegorical Genesis

[FallentoReason]

Allegory is the wrong word.

When I say "allegory" I'm using the word rather loosely. I mean it in the opposite sense of "literally" which basically means I'm being very open about my question and allowing all sorts of answers to be formulated; true allegory, poetry, numerology (as explained by Philo of Alexandria), metaphysics... I'm all ears.

I fail to see the problem with Jesus, say, backing up a point with a previously established one.

If by "previously established" you mean Jesus (by which you probably mean Paul, because he talks about creation as being literal) uses the OT as the "previously established" thing to back up his theology, then it means you're not answering the question. What is it that has been "previously established" in a non-literal Genesis? Your answer is what will give meaning to the events of the NT and how they relate to the poetic tone of the OT. In other words, you've answered without answering my question. What does it all mean?

The original was never meant to be a scientific explanation,

Agreed.

and culturally, Jesus would have been speaking from the same context.

So he spoke in a non-literal manner? Under these circumstances, how does a very literal death that he scored come into the poetic Word of God? What's the relationship between poetry and literal events like a crucifixion?

To me it beggars belief how anyone can shoe horn cosmology into it.

I think that's one that you have to sort out with your brothers.