Jesus was a Conservative Jew as described in detail in the Holy Scriptures. He was born a Jew, Lived as a Jew, Died as a Jew......living His entire life void of any sin as defined by the Law and the Prophets. The New Testament Covenant did not go into effect until after the death of Jesus Christ. When Jesus declared, "It is finished", He gave up the ghost/spirit. What was finished? The Law and the Prophets, Jesus came to fulfill the requirements of the law, not to destroy it. When ALL was finished as prophesied in the Law concerning the coming of the Messiah, when Jesus had completed His mission on earth.........to fulfill the Law and the Prophets, the kingdom of God/church of Christ was established to usher in the LAST DAYS of mankind.
Its just a "quinky dink" that the Old Testament confirms the message presented in the New Testament? Did the Romans also corrupt the Old Testament?

The Old Testament predicted there would be a changing of the Law, that would be based upon Grace and Sacrifices of Love......a change from the law written on stone, that the Jews always were found guilty of breaking (Jer. 31:31-34) .
The New Testament Law did not come into effect until after Jesus' death on the cross (Col. 2:14, Eph. 2:15). God always required that the establishment a LAW be done with the shedding of blood (Hebrews 9:15-18). The Old Law was established with the shedding of Oxen Blood (Ex. 24:7-8)
Jesus was a Jew..........He was preaching to Jews with His sermon on the mount, there was no New Covenant in existence at that time.......thus, when Jesus taught the Jews how to pray He began with, "Thy KINGDOM COME............" -- Matthew 6:10
Jesus clearly stated that He came to fulfill the Law and the Prophets.........in order to fulfill THE LAW, He was bound by the same Doctrinal Precepts as any other Jew. He lived under the Law and did not sin (Matthew 5:17-20, Hebrews 4:15)
What? Are you attempting to declare that the same Holy Spirit that is recorded in the N.T. did not exist in the Old Testament? God the Father did not move upon the waters Genesis 1. "THE SPIRIT OF GOD (what? Is God's spirit not Holy?) MOVED UPON THE WATER. The scriptures point out there is more than 1 personality acting as God......God declared, "........the man has become as ONE OF US......" -- Genesis 3:22
"My Spirit shall not always strive with man....(Genesis 6:3). ".........I have filled him with the Spirit of God......" -- Ex. 31:2. "........and the Spirit of God came upon Him." -- Numbers 24:2
These are but a few of the passages in the Old Testament that present the same Spirit of God acting in the same manner as He acted in N.T. passages..such as acts 2