I personally cannot speak to much of what has been written here.
I was taught some of the Document Hypothesis but only as in "that is what we used to teach," almost sort of the way the Governing Body offers "new light" except that this is due to new archological scholarship.
While Jews do talk about the "Deuteronomist" author(s), this is for a very limited portion of the Torah, actually limited mostly to verses found only in Deuteronomy itself. The rest of the Torah is actually divided, along with the work of other books of the Hebrew text, namely into the work of the Israelites and the work of the Judahites. The reason for this is that it is no longer believed that we were ever originally one people, or that the Biblical stories originally came from a singular culture. It appears that what we have is a story politcally manipulated by the Judahite people to read the way it does, and instead of the Torah and the Nevi'im (Joshua-Judges-Samuel-Kings) being separate collections written by different writers at separate times, the Torah and Nevi'im is actually one collection produced by one redactor or set of redactors, namely the Jedahites. They merely collected some legends and folktales from Israelites who merged with them after the Assyrians destroyed their northern territory.
While this does not mean that there are no more separate composers like "J" and "E," etc. There are, and in fact, there are a plethora more. Many others have been identified since the original Document Hypothesis was developed in the mid-18th century. "J" and "E" have now, for example, been merged, and they are considered the probable source of the Akedah.
While this doesn't mean that some of what was posted above isn't correct or that some of what many scholars have posited is no longer applicable. (You did great work, PeacefulPete. I should have teach my Sunday Hebrew school for me. My kids would love you.) What it does suggest is that we have to make room for what we now are coming to understand and that this could mean that we might have to abandon some very long-held theories.(I can hear some people crying in the backrow. It's okay. Let it out.)
Whatever the critical data shows doesn't change the traditions or applications much, nor does it makes our previous study a waste. To illustrate, of interest are the midrash traditions where Isaac does indeed seem to die and Satan plays a trick on Sarah coming to her as her son only to announce he is dead which causes Sarah's own death. There are a few versions of this. But the particular one with "the Satan" is one of the few where one can see the development of a personification that leaped from Judaism to Christianity, only to be abandoned once the character takes off as Jesus' archenemy. (See Sarah and the Akedah for more interesting details of the narratives themselves.) Jews had only a short history of demonology that came from our exposure to Persian culture but became lost with the introduction of great sages like Rambam (Maimonides) who introduced rationalism and a return to stricter adherence to traditional Judaism which has no demons. It was believed that good and evil should be morally attributed to God in the end according Scripture.--Job 2:10.
I think the Akedah is less a story about a deity and more a story about us. Where do we come from? What do we do? Do we sacrifice our children ever so blindly on altars? We do it when there is a call for secular war. We do it when there are politcal demands when we vote someone in office that our young people don't like and make them live by laws they don't agree with or can't live by. We do it when we take away their rights by these laws. We do it when we carelessly do things in this generation that makes it difficult for the young to inherit the world we live behind. We sacrifice our children on altars to our gods all the time, gods that we blindly follow because we believe in them, but gods they might not, whether it's the God of the Bible or the gods of our disbelief.
It's a shame we don't put up more of a fight for our children before we sacrifice them to something we think is best for them. There are no angels to call from the heavens to stop us. There will be no rams to wonderously appear to take their place. If we don't learn from myths or legends, then we obviously aren't smart enough to face reality.