The kingdom of God and kingdom of heaven are the same.
“From that time Jesus began to preach, and to say, Repent: for the kingdom of heaven is at hand.” (Matthew 4:17)
“And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel.” (Mark 1:15)
Your conclusion is in error. If you look at every prophecy about the coming kingdom there are way to many that cannot fit into your spiritual view or be passed down to the new Jerusalem.
In your view the kingdom came and Jerusalem is destroyed. In Zech 14 the LORD is not king until Jerusalem is falling and the LORD saves them. This is a key chapter and out of the mouth of 2 witnesses it shall be established. This narrative is supported in Dan 7 , 2 Thess 2 Rev 13. You have the kingdom coming in when the exact opposite is happening. The day of vengeance of our God is part of Jesus ministry and in 1saiah 61 Jesus read a portion of the a sentence and said this applied to him and was fulfilled in their hearing. The rest of the chapter is declaring what is accomplished in the day of vengeance of the LORD. Read the passage and think how Zion central the passage is.
To proclaim the acceptable year of the LORD,
And the day of vengeance of our God;
To comfort all who mourn,
3 To console those who mourn in Zion,
To give them beauty for ashes,
The oil of joy for mourning,
The garment of praise for the spirit of heaviness;
That they may be called trees of righteousness,
The planting of the LORD, that He may be glorified.”
4 And they shall rebuild the old ruins,
They shall raise up the former desolations,
And they shall repair the ruined cities,
The desolations of many generations.
5 Strangers shall stand and feed your flocks,
And the sons of the foreigner
Shall be your plowmen and your vinedressers.
6 But you shall be named the priests of the LORD,
They shall call you the servants of our God.
You shall eat the riches of the Gentiles,
And in their glory you shall boast.
7 Instead of your shame
you shall have double
honor,
And
instead of confusion they shall rejoice in their portion.
Therefore in their land they shall possess double;
Everlasting joy shall be theirs.
8 “For I, the LORD, love justice;
I hate robbery for burnt offering;
I will direct their work in truth,
And will make with them an everlasting covenant.
9 Their descendants shall be known among the Gentiles,
And their offspring among the people.
All who see them shall acknowledge them,
That they
are the posterity
whom the LORD has blessed.”
10 I will greatly rejoice in the LORD,
My soul shall be joyful in my God;
For He has clothed me with the garments of salvation,
He has covered me with the robe of righteousness,
As a bridegroom decks
himself with ornaments,
And as a bride adorns
herself with her jewels.
11 For as the earth brings forth its bud,
As the garden causes the things that are sown in it to spring forth,
So the Lord GOD will cause righteousness and praise to spring forth before all the nations.
Note they are creating descendants in this passage and life again continues after the day of vengeance.
IN Jer 3 God declares when His throne is established they will inherit the land promised Abraham
14 “Return, O backsliding children,” says the LORD; “for I am married to you. I will take you, one from a city and two from a family, and I will bring you to Zion. 15 And I will give you shepherds according to My heart, who will feed you with knowledge and understanding.
16 “Then it shall come to pass, when you are multiplied and increased in the land in those days,” says the LORD, “that they will say no more, ‘The ark of the covenant of the LORD.’ It shall not come to mind, nor shall they remember it, nor shall they visit
it, nor shall it be made anymore.
17 “At that time Jerusalem shall be called The Throne of the LORD, and all the nations shall be gathered to it, to the name of the LORD, to Jerusalem. No more shall they follow the dictates of their evil hearts.
18 “In those days the house of Judah shall walk with the house of Israel, and they shall come together out of the land of the north to the land that I have given as an inheritance to your fathers.
In this passage when the throne is established their conversion is clear and the land given them is clear too.
This is also found in great detail in Eze 47 at the time the new river described in ZEch 14 is now healed the dead sea and it is a prosperous fishing area. This is when the kingdom has come. and this is a thus sayeth the LORD prophecy.
13 Thus says the Lord GOD: “These
are the borders by which you shall divide the land as an inheritance among the twelve tribes of Israel. Joseph
shall have two portions. 14 You shall inherit it equally with one another; for I raised My hand in an oath to give it to your fathers, and this land shall fall to you as your inheritance.
15 “This
shall be the border of the land on the north: from the Great Sea,
by the road to Hethlon, as one goes to Zedad, 16 Hamath, Berothah, Sibraim (which
is between the border of Damascus and the border of Hamath), to Hazar Hatticon (which
is on the border of Hauran). 17 Thus the boundary shall be from the Sea to Hazar Enan, the border of Damascus; and as for the north, northward, it is the border of Hamath.
This is the north side.
I only posted a portion but this is the inheritance of the land as promised in Jer 3 being literally dished out and note the boundaries include the sea. No sea in the new creation. I can link another 50-150 clear literal passages that speak of the before and after these days and they do not contradict one another. You can spiritualize them if you like but the preponderance of the evidence is the literal view is coming and going to come to pass.