pf:

Nobody is selling anything, just explaining in the context of a caricature.

Anyone who reads narrative knows that it has characterization and that characters do good and bad things. Ask yourself this question: If what Abraham did in taking a slave as a child bearer was good, then why not have that child be Abraham's heir of promise? The fact is on a normal reading the wife is seen as being the bearer of the genuine line. That is making a point. Now on one point you are right here. Abraham reacted normally in terms of cultural expectations, but part of what Abraham is being taught by God is NOT to react that way. So this is just a good literary reading of the text (Nothing irrational here)

My response on levirate marriage had nothing to do with dispensationalism. It had to do with the two testaments and the relationship of how law functioned for Israel versus what the church is and is to be. For example, Reformed or Methodist believers would read this the same way. As for Jesus taking the proposition seriiously, he had to take the whole illustration seriously since people lived this way and since the question was a serious one about denying resurrection. His reply undercut the entire scenario, but the concern was to address the denialof resurrection.

As for God just setting people straight, Jesus tried to and look what he got. It seems clear that whether one holds to a religious faith or to just to philosophical virtue, one can call for a walk of faithfulness and righteousness and many people are not interested. I will note you ignored the kind of standard Jesus did put forward for women.

As for telling me what I think about how I really use the Bible, thanks. Your the one who used the "literally" description, not me. So you try to put words in my mouth here (the caricature I noted above). I think we are speaking about reading a text contextually, with an appreciation for what the Bible does and does not do literarily. It is easy to attack a position someone does not hold as if they do and insist that is their only option in a kind of all or nothing contrast while appealing to their complete lack of sanity. 

dlb