The Jews, during the time of Jesus, cherished a supreme hope: the coming of the kingdom of peace and justice, when the former glories of King David and Solomon would be seen again. When the Jews were in exile they had longed for such a triumphal period. Israel’s ideal Messiah would be an ideal David and greater than him. Even during the times of Jesus, the Jews, as they were under the Roman subjugation, dreamed of such a redeemer. This could be why the evangelist makes people sing: Hosanna to the son of David (Matthew: 21:9).
The Jews have not accepted Jesus as the Messiah. Their standpoint is clear. Jesus did not fulfill the messianic prophecies mentioned in the scriptures. Messiah was to bring an age of perfection characterized by universal peace and recognition of God. Isaiah 2:1-4, 32:15-18, 60:15-18; Zephaniah 3:9; Hosea 2:20-22; Amos 9:13-15; Micah 4:1-4; Zechariah 8:23, 14:9; Jeremiah 31:33-34). This has not happened.
The Bible specifically says he would build a third temple. ( Ezekiel 37:26-28) and gather all Jews to the Land of Israel. He would usher in an era of world peace, and end all hatred, oppression, suffering and disease. He would Spread universal knowledge of the God of Israel, which will unite humanity as one (Isaiah 43:5-6). Nothing of these has ever happened.
Because no one has ever fulfilled the Bible's description of the expected future King and prophesies concerning him, Jews still await the coming of the Messiah. Christians believe that these promises will be fulfilled in His Second Coming. This is a way of escapism when you cannot counter the facts. In the Jewish Bible there is no concept of a second coming of the Messiah.
The mainstream Jews have totally rejected Jesus-that too for valid reasons- and his story has harmed the community in many ways. Some modern Jewish thinkers feel that the historical Jesus may have been closer to Judaism than either the Gospels or traditional Jewish accounts would indicate. Jesus was born a Jew; he lived and died a Jew. He never even thought of instituting a new religion; perhaps St. Paul did that dirty work.
The original Jewish God is the Christian God too. But as Jesus Christ was crucified by the Romans at the instigation of the Jews, Christianity encouraged hatred towards Jews and when it became powerful-after the Roman Empire made it their official religion. In 380AD Theodosius I decreed Christianity to be the official state religion of the Roman Empire. Thereafter the Jews were looked down upon and their troubles began. Ambrose, the bishop of Mediolanum, opposed the efforts of Theodosius to acknowledge the civil rights of Jews, pagans, and heretics as equal to those of Christians. In a public confrontation with the emperor, in his cathedral, Ambrose made the emperor back down. He proclaimed that Christ was killed by the Jews and God the Father might avenge them, whom they do not acknowledge as Father since they do not acknowledge the Son. This became the typical Christian attitude for centuries to come. Christians’ conviction that the Jews had crucified Jesus and that the Jewish descendants have to share their sin - hereditary guilt- (like descendants of Adam and eve share the original sin). The correspondence of Gregory 1 shows that Jews lived untroubled among Christians in certain regions and were treated cruelly by others. In the century that followed Gregory’s papacy, the expulsion of Jews started in Europe- France under King Dagobert (626) and under the Spanish monarchy expelled them with the collusion of the Church. By the end of the 7th century the Jews had two options: choose baptism or slavery. All the time Christians believed that Jews were being divinely punished or will be punished for not accepting the new belief.
The Jews of Western Europe began to suffer new indignities as the crusades came on. The Christian mobs and crusaders slaughtered Jews or committed pillage and it lingers long in the Jewish memory. In the fourteenth and fifteenth centuries, the slanderous charges against Jews often led to massacres. Many German Jews fled eastward. Even Martin Luther, towards the latter part of his career, wrote against the Jews and termed them ‘damned rejected race.’ From the early 19th century, anti-Jewish sentiment of the Catholic and the Protestant Europe was becoming more pronounced. Anti-Semitism was simply targeting the Jewish ethnicity.
The Jews were often preyed upon by the Christian majority and harsh infringements of Jewish rights got censured and restrictions were imposed on their full participation in the society. They had to pay for crucifying Jesus and for not accepting the new religion! Some Christian historians observe that although such cruelties and enslavement did take place but the Jews were not eliminated as it happened in the Nazi era! The cruelties and enslavement have continued for centuries up to the modern times. Many of today’s Jews and a good section of the world community are convinced that the horror of Hitler’s days (recall the gas chambers at Auschwitz) was simply the culmination of centuries of "Jew Hate" entertained by the Christians.
Thus Yahweh-the common God of the two groups- inspired Christians to kill His own people whom He had selected so judiciously and freed them from the Egyptian slavery by punishing Pharaoh and all Egyptians. He had helped them settle in the land of Canaan by massacring surrounding kingdoms and guarded them like a possessed one and with whom he traveled in the desert in an arc always. It is contradictory to the nature of any god to let his chosen sect persecuted and killed by a new sect owing allegiance to the same God.