As for me, I've come to realise that there is no point in arguing this further.

Having thought about it, there is no reason to accept the Bible as an authority over the Tale of Gilgamesh (which is more ancient), the Qu'ran (which at least was delivered by on angel's command, rather than subject to human edit), or the latest Incredible Hulk tpb (which has fewer inconsistencies).

At the end of the day, the fundamental argument the Christian debaters mount is "Because the Bible says so". Lacking faith, I can't accept this as a valid or convincing proposition.

In any event, I think Dave has said that he sees no reason why a gay legal marriage shouldn't be allowed, just not a Christian gay marriage.