[so_real]

Our word Christ came from the Greek word Christos which was the Greek translation of the Hebrew word Messiah meaning "Anointed". The Old Covenant Jews used the word Messiah as a title for their expected Deliverer - the one that prophesy told them would come to redeem them.

The word "Covenant", or "Testament" if you prefer, means "binding contract". The binding contract, that is the Old Covenant, was the promise given by God that a redeemer would come for them. Every Old Covenant Jew lived in the promise that the Christ would redeem them.

Jesus became Jesus the Christ or Jesus Christ as it became known He was the annointed One of whom the Old Covenant spoke.

Perhaps our definitions of "union with Christ" differ, but I believe you would have risked a stoning to tell the Old Covenant Jews they were not in union with Christ -- that is the promise they lived for.

Do the Bible passages you mark speak of "the Christ", "Jesus the Christ", "Jesus Christ" -- or do they only refer to "Jesus"? The Christ was the known redeemer of the Jew before He was the known redeemer of the Gentile as well.

[fortheDeclaration]

A covenant is not a Testament (Heb.9)

As for the Union with Christ, that was something revealed to Paul (Eph.3).

This 'Union' goes beyond salvation, it shows a special relationship, that the Jews rejected and thus, was offered to the Gentiles (Rom 9-11), although individual Jews, when saved are brought into this 'new' body (Eph.1:23, 5:30, Gal.3:28).

Those Covenant made to Israel will be completed in the future when the Church is taken to heaven in the Rapture (1Thess.4:16-17 Heb.8:8, Jer.31:31), and the King of King and Lord of Lord, the Lion of Judah, comes to take the throne of David (Rev.19) and rule the world (Psa.2, Isa.9)