The reason why incest is forbidden is because genetic malformations are the result when two people, who are too genetically similar, mate. It does not mean that it was always going to be allowed.
At this point in time, there was little risk that a malformed child would be born. It was a necessary allowance to populate the earth enough where dissimilar people would eventually be born where the restriction could be brought in.
bump
A pro-life freeper has told me that undesirable genetic traits do not show up with only one incestuous act but occur with inbreeding over a period of time.
I also remember learning, way back, that the ban against brother-sister incest was due to the fact that the attraction, combining siblinghood with sexual partnership, would be too strong between the two and would prevent them from ever finding an appropriate mate. This obviously refers to temporary brother-sister incest. It is clothed in authority in my memory, so it may have been the nuns.
Thank you for remembering that for me.
So incest would be OK with God if it didn’t lead to genetic malformations? Nonsense.