CKDextHavn:
All those properties you listed for similarities are Old Testament concepts. As is the concept of the messiah. But even if you get into those concepts now (I am talking today’s versions of Christianity and Judaism) most answers would be either vastly different or so general even athiest and agnostics would agree.
Belief in one God, creator of the universe. True, but mainstream Christianity holds the Trinity, Judaism does not. My guess is if you asked a Christian if they worship the same God as the OT, they would say yes (I know I would have), but if you ask a Jewish person if Christianity did, they would probably chuckle, and answer a resounding no. On the other side of the coin, Chistians would say that Jewish people do, but have failed to see the arrival of the Messiah as prophecied in the OT, and are therefore in error.
OT prophets. While agreeing that they brought the word of the One God, Christians would say that these prophesies point to Christ and his redemption, while Judaism would disagree on a number of grounds. While the prophecies are there, the interpretation varies widely, at least as it applies to the messiah.
Moral Code is something engrained in us all. I don’t think that anyone, regardless of beliefs, would say that the 10 commandments are bad ethically.
Good rewarded and evil punished, but in a vastly different way. And again, I think this is common to all religions. This can also be applied to the masses, ask anyone regardless of beliefs if the good should be rewarded and bad punished and it’s a fairly good bet you’ll get a yes.
I can understand re-assesing your beliefs, or listing principles in the face of heresy or for simplification for the uneducated (i.e. Maimonides 13 principles, the various Creeds formed in the early church) but those principles should have a solid base. I have always believed that the base on which Christianity came about was, other than Jesus, Judaism. It is not just that one religion believes the messiah has come and one hasn’t. It is more deeply rooted than that.
As for Christianity coming from Jewish ideas, I can only think of the early Christian church and the “fringe” ideas that came about then. The Gnostics and the Montanists where based on Christian ideas but firmly rejected by the church as not only “wrong” but “heretical”. These were more than just differences in opinion, these were theological barriers that could not be overcome.
I guess I’m at the point that the OP lists theoligical barriers that I am having a great deal of difficulty overcoming. There is a saying that a pastor I knew used to say “In essentials unity, in all other matters liberty.” And while I think this was partly a defense to some of the teachings the Pentecostal/Charasmatic church has been spouting for the last 100 years, it was also an explanation of how different Christian denominations can co-exist. However, I see no unity in essentials between Christianity and Judaism, just a lot of liberties taken.