moshe - "Many Rabbis look at the Torah as more of the evolution of human morality. For example, the Jews had many, many laws to regulate the moral treatment of stangers, captives and travelers long before the nations around them did.. Jesus is just another positive step in the emerging morality of the Jewish people..."
I've gotten this impression, too. Another example would be the clearly defined civil rights of indentured servants.
tec - "Christianity does not hinge on this tit-for-tat ransom sacrifice."
I agree; authentic Christianity (IMO) hinges on Jesus' teachings, particularly "love thy neighbor", "forgive up to 77 times", etc. As far as I'm concerned, the rest is gravy.
However, for most fundamentalist Christians, it does hinge on the "tit-for-tat ransom sacrifice". Remember, the vast majority of them are big fans of the OT - or at least, the "eye for an eye" parts (whether they want to admit it or not).
BTW, I'm mostly "post-Christian" these days also partly due to the WTS exceedingly thorough job discrediting virtually any other form of organized religion. I occasionally lean towards Unitarian Universalism because I'm still most comfortable with a Judeo-Christian framework, but I'm not actively religious in practice.