Jesus claimed to be King of the Jews because he was and is the King of the Jews.
Luke 23:3 [NKJV] Then Pilate asked Him, saying, "Are You the King of the Jews?" He answered him and said, "It is as you say.
Jesus is the heir to David's throne and so the rightful King of the Jews.
Luke 1:31-33 And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name JESUS. He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David: and he shall reign over the house of Jacob for ever; and of his kingdom there shall be no end.
Israel will be the centre of a world-wide kingdom ruled over by Christ and the saints.
Numbers 14:21 but truly, as I live, all the earth shall be filled with the glory of the LORD
Psalm 72:7,8 In his days shall the righteous flourish; and abundance of peace so long as the moon endureth. He shall have dominion also from sea to sea, and from the river unto the ends of the earth.
Isaiah 2:1-5 The word that Isaiah the son of Amoz saw concerning Judah and Jerusalem. Now it shall come to pass in the latter days That the mountain of the LORD’S house Shall be established on the top of the mountains, And shall be exalted above the hills; And all nations shall flow to it. Many people shall come and say, "Come, and let us go up to the mountain of the LORD, To the house of the God of Jacob; He will teach us His ways, And we shall walk in His paths." For out of Zion shall go forth the law, And the word of the LORD from Jerusalem. He shall judge between the nations, And rebuke many people; They shall beat their swords into plowshares, And their spears into pruning hooks; Nation shall not lift up sword against nation, Neither shall they learn war anymore. O house of Jacob, come and let us walk In the light of the LORD.
Revelation 2:9,10 And they sang a new song, saying: "You are worthy to take the scroll, And to open its seals; For You were slain, And have redeemed us to God by Your blood Out of every tribe and tongue and people and nation, And have made us kings and priests to our God; And we shall reign on the earth."
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