That we have a very clear comprehension of dogmatic truth in a simple mathematic equation, not up for arbitration nor oblique reasoning, and thus, for the Lord has called sodomy an abomination, it is against His nature to create, in His image, a genetic structure that is an abomination.
You fail to recognize the actual implications of the Fall. All creation was distorted when Adam turned from God's intent to be in communion with Him, and human nature most of all. We are not souls dwelling in bodies, or imprisoned in bodies, but unities of soul and body. It was not Adam's soul which was distorted when he was robbed of the garment of incorruption which is the Holy Spirit, but his whole being, how should this change not be reflected in the fiber of our being? Yes, even at the molecular level.
You also fail to distinguish between the temptation and the sin. There is no abomination in overcoming through grace a besetting temptation or propensity toward sodomy, but triumph. The propensity is either a source of sin if yielded to, or an ascetic podvig, which borne and overcome is a source of glory. Likewise with all the propensities toward sin which we bear. Wrath and pride will land us in Sheol just as quickly as buggery.
Excellent point and well worth repeating