“A Redeemer will come to Zion, and to those who turn from transgression in Jacob,” declares the LORD. 21 “As for Me, this is My covenant with them,” says the LORD: “My Spirit which is upon you, and My words which I have put in your mouth shall not depart from your mouth, nor from the mouth of your [a]offspring, nor from the mouth of your [b]offspring’s offspring,” says the LORD, “from now and forever.”"“Behold, days are coming,” declares the LORD, “when I will make a new covenant with the house of Israel and with the house of Judah, 32 not like the covenant which I made with their fathers in the day I took them by the hand to bring them out of the land of Egypt, My covenant which they broke, although I was a husband to them,” declares the LORD. 33 “But this is the covenant which I will make with the house of Israel after those days,” declares the LORD, “I will put My law within them and on their heart I will write it; and I will be their God, and they shall be My people. 34 They will not teach again, each man his neighbor and each man his brother, saying, ‘Know the LORD,’ for they will all know Me, from the least of them to the greatest of them,” declares the LORD, “for I will forgive their iniquity, and their sin I will remember no more.” (Jeremiah 31:31-34)
Has that promise been fulfilled? Do all the Jews, down to the last one, know Jesus Christ? And if it hasn't been fulfilled yet, did God lie when He made that promise to His covenant, chosen people?
How about this promise to Israel?
“My servant David will be king over them, and they will all have one shepherd; and they will walk in My ordinances and keep My statutes and observe them. 25 They will live on the land that I gave to Jacob My servant, in which your fathers lived; and they will live on it, they, and their sons and their sons’ sons, forever; and David My servant will be their prince forever. 26 I will make a covenant of peace with them; it will be an everlasting covenant with them. And I will [b]place them and multiply them, and will set My sanctuary in their midst forever. 27 My dwelling place also will be with them; and I will be their God, and they will be My people. 28 And the nations will know that I am the LORD who sanctifies Israel, when My sanctuary is in their midst forever.”’” (Ezekiel 37:21-28)
Is David currently king over the nation of Israel? Did God lie when He made that promise to the nation of Israel?
Paul had to deal with the same question and he answered it in Romans 11...the whole chapter is instructive in that he compares Jews to natural branches of a tree and gentiles as grafted in branches on that same tree.
Rom 11:25 For I do not desire, brethren, that you should be ignorant of this mystery, lest you should be wise in your own opinion, that blindness in part has happened to Israel until the fullness of the Gentiles has come in.
Rom 11:26 And so all Israel will be saved, as it is written: "THE DELIVERER WILL COME OUT OF ZION, AND HE WILL TURN AWAY UNGODLINESS FROM JACOB;
Rom 11:27 FOR THIS IS MY COVENANT WITH THEM, WHEN I TAKE AWAY THEIR SINS."
Rom 11:28 Concerning the gospel they are enemies for your sake, but concerning the election they are beloved for the sake of the fathers.
Everything promised to Israel will happen. The promises of God are irrevocable. Rom 11:29 For the gifts and the calling of God are irrevocable.