One reason that true Christians are so supportive of the nation of Israel and Jews in general is that we believe what God told Abraham, “I will bless them that bless thee, and curse him that curseth thee” (Genesis 12:3And I will bless them that bless thee, and curse him that curseth thee: and in thee shall all families of the earth be blessed.
See All...).  Another reason is the knowledge that the Jews will yet have their kingdom.  Yes—this too is taught in the New Testament.

Right before Jesus ascended up into heaven after his resurrection, his disciples asked him, “Lord, wilt thou at this time restore again the kingdom to Israel?” (Acts 1:6When they therefore were come together, they asked of him, saying, Lord, wilt thou at this time restore again the kingdom to Israel?
See All...).  Jesus did not tell them they were mistaken about the restoration but rather answered, “It is not for you to know the times or the seasons, which the Father hath put in his own power” (Acts 1:7And he said unto them, It is not for you to know the times or the seasons, which the Father hath put in his own power.
See All...).  The restoration would come but the time was not to be revealed.

Paul taught that, “blindness in part is happened to Israel, until the fulness of the the Gentiles be come in” (Romans 11:25For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in.
See All...).  In other words, the times of Gentile domination will one day come to an end.  “And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob; For this is my covenant unto them, when I shall take away their sins” (Romans 11:26-27 [26] And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob: [27] For this is my covenant unto them, when I shall take away their sins.
See All...).  Other passages in the New Testament also confirm this truth that Israel will again be the center of God’s kingdom on earth some day in the future.  Oh, what a glorious day that will be!