But Jesus said the kingdom of God was here now, before his shed blood.
Shadows and examples (sacrifices, defilements, cleansings, feasts, etc.) are the physical representations of the spiritual.
The kingdom of God now spiritually within is not a physical representation of another (spiritual) kingdom to come.
That is the reverse of God's Biblical pattern, which is: the physical represents the spiritual, not the other way around.
The spiritual kingdom of God which Jesus brought at his first coming is the promised (spiritual) kingdom of God.
It is the only kingdom of God. There is no other.
A future earthly kingdom was the false misunderstanding of the OT Jews, and which caused them to reject their Messianic king and his spiritual kingdom.
Just as the promised everlasting possession (Ge 17:8, 48:4) of physical land was a promise of spiritual (heavenly) land (Heb 11:13-16,
so also the promised physical Messianic kingdom of God was a promise of the spiritual kingdom of God, brought in by the Messiah at his first coming, and which they rejected.
There is no other kingdom of God. They don't get a second bite at the apple.
All mankind is on the same footing, salvation is by faith in Jesus Christ.
The NT kingdom of God (within the people of God, the church) is the fulfillment of God's promised kingdom.
The Old Covenant promises were types of their fulfillment in the New Covenant.
The New Covenant kingdom is not celestial, it is the kingdom of God now (Mt 12:28, Lk 11:20), as well as for all eternity.