"...Leviticus folklore.. "have you got a transcript or something, jack.
...quoting things I don't remember?

maybe you find it helpful to say genesis is non historical, McGrath, but Jesus clearly didn't, though I don't know if you trust the gospel accounts as historical narrative either.
in addition Hebrew scholars I could quote, have no doubt from their knowledge of the language that the text in genesis is intended as historical narrative, though 1v 27 has the parallelism of Hebrew poetry common in especially in psalms.