Israel Still Belong To God

If God were finished with Israel , why would He return there to Jerusalem. He said:

Acts 1:9-11 "9 Now when He had spoken these things, while they watched, He was taken up, and a cloud received Him out of their sight. 10 And while they looked steadfastly toward heaven as He went up, behold, two men stood by them in white apparel, 11 who also said, "Men of Galilee, why do you stand gazing up into heaven? This same Jesus, who was taken up from you into heaven, will so come in like manner as you saw Him go into heaven."

Matthew 24:30 "Then the sign of the Son of Man will appear in heaven, and then all the tribes of the earth will mourn, and they will see the Son of Man coming on the clouds of heaven with power and great glory."

Romans 11:1-5
Israel’s Rejection Not Total
11: I say then, has God cast away His people? Certainly not! For I also am an Israelite, of the seed of Abraham, of the tribe of Benjamin.
2 God has not cast away His people whom He foreknew. Or do you not know what the Scripture says of Elijah, how he pleads with God against Israel, saying,
3 “Lord, they have killed Your prophets and torn down Your altars, and I alone am left, and they seek my life”?
4 But what does the divine response say to him? “I have reserved for Myself seven thousand men who have not bowed the knee to Baal.”
5 Even so then, at this present time there is a remnant according to the election of grace.

Many in Israel have rejected Christ, but there is a remnant there that are born again and they will be the nation of Israel in the end times that bring the gospel to the rest of the world at that time. Two thirds of Israel will be removed leaving one third that will be the nation of Israel spoken of at the end of all things.

Romans 11:7-16
7 What then? Israel has not obtained what it seeks; but the elect have obtained it, and the rest were blinded. 8 Just as it is written:
“God has given them a spirit of stupor,
Eyes that they should not see
And ears that they should not hear,
To this very day.”
9 And David says: “Let their table become a snare and a trap,
A stumbling block and a recompense to them.
10 Let their eyes be darkened, so that they do not see,
And bow down their back always.”

Israel’s Rejection Not Final
11 I say then, have they stumbled that they should fall? Certainly not! But through their fall, to provoke them to jealousy, salvation has come to the Gentiles.
12 Now if their fall is riches for the world, and their failure riches for the Gentiles, how much more their fullness!
13 For I speak to you Gentiles; inasmuch as I am an apostle to the Gentiles, I magnify my ministry,
14 if by any means I may provoke to jealousy those who are my flesh and save some of them.
15 For if their being cast away is the reconciling of the world, what will their acceptance be but life from the dead?
16 For if the firstfruit is holy, the lump is also holy; and if the root is holy, so are the branches."