DID YOU KNOW that everywhere the word Redeemer is used in the Torah and the Prophets, you will find that the meaning of the word is to redeem (according to the Oriental law of kinship), i.e., to be the next of kin (and as such to buy back a relative's property, marry his widow, etc.)? It is the responsibility of the Kinsman Redeemer to redeem His relative(s), the one(s) to whom He is closely related.
Now think about these often quoted words of Ruth: "Your people (shall be) my people, and Elohekka (your El), Elohay (my El)." Have you ever asked yourself why she said, your people, my people; Elohekka, Elohay, instead of the other way around?
Why did the Messiah say that He had been sent only to the lost sheep of the house of Israel? Not all the children of Jacob (Israel), but to the house of Israel? Who is the house of Israel?
SOMETHING ELSE TO PONDER: Why were fishermen sent to the Jews, who already had the Temple and the Torah; but Paul, a rabbi of rabbis, was sent to the nations (gentiles)?
SOMETHING TO CHECK OUT: History confirms that the ten tribes of the house of Israel were taken captive in 722 B.C.E. because of their disobedience, consequently becoming scattered throughout the nations of the world and indistinguishable from the gentiles. After all, they were vomited out of their land because they imitated the pagans, worshiping their gods and mixing pagan forms of worship into their worship of the Creator of the Universe.
These are the ones (his flesh) the Messiah came to redeem, the lost sheep of the house of Israel. [Matthew 15:24]
In these last days, they are beginning to return to the Elohim of their Fathers in obedience to the Torah (His instructions for having life) and Y'hoshua, His Anointed. You may join with His people, but you cannot replace them.
FOR FURTHER STUDY: First, please read the Book of Hosea and Chapter 37 of Ezekiel, then look up and read all the other Scriptures about the house of Israel.