Spong draws on scholarship that mentions how certain Jesus stories, their ordering and content, relates to the Jewish liturgy and festivals. (I don't know enough about any of this to comment on this part) I got the impression that in light of the Torah reading and the season, Spong is suggesting a Jesus follower at certain synagogue would preach a message, creating stories about Jesus in light of Hebrew scripture.
So in connection with the liturgy having to do with Joseph dreamer of dreams, who went down to Egypt to save Israel, Matthew crafted a tale about Joseph supposed husband of Mary, going down to Egypt, resulting in salvation for Israel. Then as we have in Genesis, Pharaoh massacring the children, so now we have Herod who massacres the children. Later as Moses parted the sea, the heavens (the waters above) part at Jesus' baptism, then Jesus goes into the wilderness and experiences the same testings as Moses, after this he gives his sermon on the mount similar to Moses, and we have John the Baptist, who happens to be presented as if he is Elijah, etc... all of these things and many more to follow are said to line up with the Jewish liturgy.
I found much of this to be pretty interesting, it seems clear early on Christianity was a Jewish movement, and Matthew especially draw parallels of from the Hebrew story and connects it with Jesus. I see how N.T Wright has likely drawn from a lot of the same scholarship, of course, reaching different conclusions.
As the title makes clear, Spong's conclusion is that the original Jewish audience, knowing the Hebrew stories, obviously wouldn't have taken any of the Jesus stories literally, the parallels were too overt. The early followers of Jesus didn't know anything about what Jesus said or did, and they also knew not to take anything said about Jesus literally. They immediately knew anything Jesus was said to have said, he didn't say, and anything he was said to do, he didn't do. It was later on that the Gentiles, who not knowing custom of Jewish myth-making, took the stories about Jesus literally. For Spong all of this isn't a possibility, it is instead FACT, he is absolutely certain the original hearers of Matthew wouldn't have taken any of it as history.
But I'd suggest one more reasonably could suggest the possibility that Matthew draw from an actual historical oral tradition, and found parallels with the Hebrew tradition, then crafted a tale showing Jesus to be the climax of the Jewish story. Even if Matthew is doing a very loose retelling and liberally adding details to make theological points, even if Matthew is doing what we'd now call “historical fiction”, it is still could be somewhat based upon history. This just seems far more plausible than what Spong forcefully asserts again and again.
The main thing I didn't care for is that Spong cannot write very long without going into another side tirade against fundamentalist, writing how Christianity will die if we all don't take his non-literal approach. Spong is a bit of a fundamentalist himself, just of a different mold, he just as dogmatic, hyper-certain and absolute in his conclusions which are rooted upon non-provable and rather shaky reality assumptions.
Spong's assumes miracles do not happen, cannot happen and never have happened. So of course Jesus never worked a miracle, nor was raised from the dead.
He assumes God (or I guess I should say Being itself) has not and could not do anything in our world or speak to anyone.
If there is any parallel of Jesus' life with Israel's past, it was made up. (but for one case)
If Jesus said anything that might have been relevant to the church later, Jesus couldn't have said it, it was made up by the church later on.
The kingdom of God refers to church, Jesus couldn't have said anything about the church, therefore, everything Jesus said about the Kingdom of God, every kingdom of God parable, the Lord's prayer, etc... definitely were not spoken by Jesus.
Anything Paul didn't explicit state about Jesus in the few letters we have of his, he didn't believe or didn't know about. With Paul lack of evidence is also absolute proof of absence.
Spong seems to assume there is no traditions or oral traditions, gospels writers knew nothing but the sources sitting in front of them. They also are assumed to have absolutely no interest in the historical Jesus whatsoever.
Somehow this Jesus of whom nothing of which he did, or said was remembered or ever recorded, just some bastard (Spong does attribute that much to history) was crucified like 1000s of other criminals, somehow was so inspiring that the gospel writers completely made up whole-cloth a bunch of myths to show how amazing Jesus is.
I find it simply incredible that people could be so inspired by someone, and to have started a movement right after his death, and not have retained a single memory of anything Jesus said or did. For all intent and purposes, Spong might as well be a Jesus' mythicist, I guess Spong considers himself a strong Christian, because these ancient Christian myth-makers did write some things that are rather inclusive and universal, that has helped him to champion gay rights. He has so much contempt for the Christian liturgy in the Epistle church, it does amaze me that he is a Bishop.
But yeah, how did some failed revolutionary inspire all this myth-making? Eventually Spong shares some history, if I recall right, I suppose, some Jews, after the fall of Jerusalem, wanted to rub some salt in the wounds. They were like see, this failed messiah of whom absolutely nothing known, who did nothing of significance, and of whom the Romans crucified and of is still good and dead and will never exist again. Well, yeah, this person actually was the Messiah, and he is the temple, and yeah... you screwed up killing him, He is the true Moses, and John the Baptist was Elijah, and oh... yeah, Mary was a loose woman, but hey... Tamar, Ruth, Rahab and Bashemba...
Now I must say Spong was better than other biblical critics in matters of consistency, since he discounts the historicity of almost everything, he engages in less Procrustean scholarship—the incredibly ease with which liberal's pick and chose, arranging the puzzle pieces to fit can be infuriating. With Spong I did notice in one case, when it favored his thesis, Spong takes as LITERAL HISTORY (Oh my gosh, Spong is a Gentile heretic!!) that the disciples left Jesus once betrayed, even though the text was said this was to “fulfill scripture” that when the shepherd was struck, the sheep would be scattered. So every other example that is drawn from the Old Testament is obvious myth, but this example, since it supports his minimalist stance, is history. So yes a bit of Scholarship of convenience.
So much of the conjectures are build upon the claim of a late dating of Mark. I find this premise weak, It is based upon the dogmatic claim that since Mark talks about the destruction of the temple, it HAD TO be written after the fall of Jerusalem, all of facts be damned, end of conversation, no other evidence needs to be considered, the debate is over.... But even from a naturalistic perspective, this conclusion doesn't necessarily follow! In Jesus' own tradition, he had Jeremiah who proclaimed the destruction of the Temple, and considering the revolutionary tendencies of the Jews against Rome at that time, it would take a prophet to predict this! I could have freaking predicted it. Yet simply because of this anti-supernatural bias, assuming the supernatural is being suggested when it isn't, they confidently give it a late date, then dating everything else later, and the mountains of arguments that are all based upon this extremely weak premise are staggering. Ugg... the group think out there among liberal theologians and many weak assumptions irk me.