You just ignored this passage which demonstrates the Lord Jesus said that the kingdom would not even be near until he returned:
"And then shall they see the Son of man coming in a cloud with power and great glory. And when these things begin to come to pass, then look up, and lift up your heads; for your redemption draweth nigh. And he spake to them a parable; Behold the fig tree, and all the trees; When they now shoot forth, ye see and know of your own selves that summer is now nigh at hand. So likewise ye, when ye see these things come to pass, know ye that the kingdom of God is nigh at hand" (Lk.21:27-31).
We also know that the kingdom had not been restored to Israel at Acts 1, as witnessed by the Apostle's question to the Lord Jesus:
"When they therefore were come together, they asked of him, saying, Lord, wilt thou at this time restore again the kingdom to Israel?" (Acts 1:6).
The Lord Jesus said the following about His kingdom:
"Jesus answered, my kingdom is not of this world: if my kingdom were of this world, then would my servants fight, that I should not be delivered to the Jews: but now is my kingdom not from hence" (Jn.18:36).
Despite this you say that His kingdom was on the earth and that is how you try to change the meaning of what the Lord Jesus said about the world wide harvest that will happen at the end of the age:
"He that soweth the good seed is the Son of man; The field is the world; the good seed are the children of the kingdom; but the tares are the children of the wicked one; The enemy that sowed them is the devil; the harvest is the end of the age; and the reapers are the angels. As therefore the tares are gathered and burned in the fire; so shall it be in the end of this age. The Son of man shall send forth his angels, and they shall gather out of his kingdom all things that offend, and them which do iniquity; And shall cast them into a furnace of fire: there shall be wailing and gnashing of teeth. Then shall the righteous shine forth as the sun in the kingdom of their Father. Who hath ears to hear, let him hear" (Mt. 13:37-43).
Since you have no place for the fulfillment of this prophecy in your eschatology you must "invent" a kingdom which was exclusive to Israel and operational while the Lord Jesus walked the earth. But there was no kingdom like that in the first century.
Here is something else which will happen at the end of the age and it is certain that this prophecy has not yet been fulfilled:
"I will gather all the nations to Jerusalem to fight against it; the city will be captured, the houses ransacked, and the women raped. Half of the city will go into exile, but the rest of the people will not be taken from the city. Then the Lord will go out and fight against those nations, as he fights on a day of battle. On that day his feet will stand on the Mount of Olives, east of Jerusalem" (Zech.14:2-4).
If this event happened in the past then tell me when it happened.
Thanks!