[quote="Zhenia, post:15, topic:248995"]
For starters, check into the history of why the LXX (Septuagint) was suppressed by rabbinic Judaism after the time of Christ, and replaced with the Masoretic Text (even though the Talmud even says that the LXX was written under Divine inspiration 300 years before Christ, and was fully accepted and used by all Jews).
The early Christians used the LXX Messianic prophecies to win souls for Christ, and this disturbed the rabbis of the time, since many of those souls were Jewish. They decided to suppress the LXX and come out with a version of the Tanakh with re-translated passages, designed to sound less like Christ (Isaiah 7:14 being one of the most famous.)
For more info see "Justin Martyr's Dialogue with Trypho the Jew": earlychristianwritings.com/text/justinmartyr-dialoguetrypho.html They also removed certain lines in some of the prophecies that made them sound too much like Jesus.
Ancient Judaism believed that blood of sacrificed animals atoned for sin, and nothing else. This is in the Torah. However, after Jesus was crucified (and the Temple was destroyed in 70 AD/CE as He foretold), animal sacrifice could no longer be performed, so the rabbis decided to change what Judaism had previously believed...now, they claimed, sin could be atoned for by tzedakah (charity),mitzvot (good deeds) and tefillah (prayer).
Furthermore, as I stated earlier, the rabbis uniformly believed that Is 53 spoke of the coming Messiah, and it was not until Rashi in medieval France decided that is meant the people of Israel (the Jews) instead.
Ancient Judaism also believed in a triune Godhead, contrary to modern Jewish beliefs:
"Hear O Israel, YHVH Elohenu YHVH is one. These three are one. How can the three Names be one? Only through the perception of Faith: in the vision of the Holy Spirit, int he beholding of the hidden eyes alone. The mystery of the audible voice is similar to this, for though it is one, yet it consists of three elements--fire, air and water, which have, however, become one in the mystery of the voice. Even so it is with the mystery of the threefold Divine manifestations designated by YHVH Elohenu YHVH---three modes which form yet one unity." (Zohar, Vol 3, p 134, Soncino Press, c 1984, London)
(Note: the Kabbalah, of which the Zohar is the largest part, consists of oral beliefs handed down for many centuries until finally being committed to writing, not unlike the oral law (Talmud.)
Ancient Judaism also believed that a very holy tzaddik (righteous man) could suffer and die to atone not only for the sins of his generation, but also, if he is exceptionally righteous, for the sins of all mankind from the very first humans (see Derekh Hashem, The Way of God, by Rabbi Moshe Chaim Luzatto, a/k/a The Ramchal, p 123, Feldheim edition).
Zhenia, I'll address two of your points for now and try to get to your other comments a little later. One can easily be dismissed, namely the passage you quote from the Zohar claiming that the Shema is really the equivalent of the Trinity since it mentions G-d's name three times. This happens to be a well-known forgery, which was perpetrated by Chosen People Ministries and a "Rabbi" Cohn (who is a Christian convert), and used frequently by this group of Protestant missionaries. The original Zohar simply does not contain this passage. Another point you raised, that is, about the blood sacrifice of animals for atonement, which is mentioned in Torah, is also often used by missionaries. First of all, this type of atonement is effective only for unintentional sin, not for intentional sin, and is in fact deemed the LEAST effective form of atonement. And secondly, Torah mentions other forms of atonement, such as incense and prayer, in Leviticus and Exodus, for example.