Sorry it took so long to get to this thread. In a matter of total contradiction, I believe Jesus never existed. He wasn't Jesus ben anything. The reason why I concluded he never existed (which I concluded last year after 12 years of atheism) the details of his life got filled in 100-200 years after he purportedly died. There are *no* contemporary records of his having lived, Including by well-educated people living in Judea at the time. That includes Philo of Judea who wrote on every topic imaginable and was well connected to the priesthood. The charismatic Christ seems to seems to have passed without notice of people at the time.
Some secularists might believe that Jesus was a man who was promoted by legend to Godhood. I believe he was more like a God who became man.
For Jewish sources, the Rabbinical writings never mention the name Jesus. There are characters in them with names that have been taken to be pseudonyms for Jesus. These "comparisons" are easily debunked, and say more about the desperation of scholars to find something more or less contemporary about him.
Moreover, the Talmuds, of which there are two: one the Palestine Talmud written in the 3rd century CE does not mention Jesus at all. The Babylonian Talmud, written 500 years later, does have details about Jesus. Again, the further away in time and space you go, the more details about Jesus's life are filled in.
Dr Gonzo's reference to Yeshu ben Yoseph comes from a source called the Toldoth Jeshu. It was a tract, or literary tradition that started much later. As the Jews were further and further oppressed by the Christians, they wrote some anti-Christian tracts. These came much later than the life of Christ and are now known to have any attachment to an historical Jesus.
The argument gets stronger if you read the books that did not make it into the Canon. Contradictions in Matthew, Mark, Luke and John make it look like there certain details of his life were a source of disagreement (simple things like how many disciples he really had and what their names were.) Having studied it, I think the argument is pretty strong that the guy never existed. Perhaps the most damning evidence: the name was not originally related to the name Joshua. It was a title that meant saviour. It didn't become his proper name until 2 centuries later.
I could go on. This is just some of it.
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I would like to answer your point about pagan culture: You forget to say how much even the Christian God is pagan himself. The God, introduces himself to Abraham as El Shaddai. (Gen 17:1) El was really the father of a pantheon of pagan deities widely worshipped in what's now Palestine. El Shaddai was one of his sons. Elohim-- a plural name of all the Gods of the pantheon, occurs 1500 times in the first 15 books of the Bible-- in which there's only supposed to be one God. This has been a source of embarrassment for Jewish and Christian scholars.
BTW, besides Yahweh, God introduces himself as El Elyon (Most High God), El roi (God of Vision) El Sabaoth (God of Heavenly Host)... and there are plenty of other variants. Monotheism was forced on the story later.
Lest you think it was the early stories that were rather confused about the identity of God: Psalm 82 shows God getting quite angry at his brothers and sisters at the council of El.
The word Israel itself might be a compound of the names of three Egyptian gods: Isis, Ra, and El.
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I have a few comments on what you wrote to Jack concerning having a moral code and failing or bending morality to fit your desire.
Bending morality to meet your behavior will usually lead to the same results as having a moral code and not following it. Usually the latter is is worse in terms of results, because you are holding and judging everyone else by the stricter morality while you will live in peace and forgiveness for your own failures. At least with the former, there's not as much danger of doing that.
Foremost, what you really mean by "having" a moral code is having adopted one pre-assembled by some other people, such as the ones who wrote the Bible. In doing so, you also get to "bend" moral law to fit your own life. I doubt that you follow the kosher laws. I doubt that you'd marry your brother's widow if he dies childless, or bathe yourself before you pray. You have, for all intents and purposes, have bent morality to your will. Rather, you've let other people bend it into a form in which you're willing to buy it.
I've developed my own moral code. In many ways, it parallels Judeo Christian morality, but there are some profound differences. One of them pertaining to sex. I don't feel I bend my morality to fit my behavior, but I think that any moral code that could be written can not explain it completely. It's more like aesthetics.