FSSL the misrepresenter of all that is called doctrine inventing something entirely new as usual.It is the historical record of God establishing His Kingdom through David and Jesus. We are a part of the kingdom of Jesus, which began with the dynasty of David.
Covenant Theologians disagree with this. Dispensationalists disagree with this.
All Dispens believe the Spiritual Kingdom of God started in either Acts 2, 9, or 28 and not before, as the Spirit was not yet given (John 7:38-39).
All Dispens understand the differences between the Physical Kingdom of God (Kingdom of Heaven) coming in the Millennium, and this Spiritual one.
"We are part of the kingdom of Jesus, which began at David." -FSSL. Wild.
Why do many New Versions also title Mark 16:14-18 as the Great Commission:
"And he said unto them, Go ye into all the world, and preach the gospel to every creature.
He that believeth and is baptized shall be saved; but he that believeth not shall be damned.
And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues;
they shall take up serpents; and if they drink any deadly thing, it shall not hurt them; they shall lay hands on the sick, and they shall recover."
I'll let you reconcile Mark 16 with Matthew 28. And nay, despite popular traditions of men (who can't agree among themselves anyway), UGC does not force the Great Commission prior to the Revelation of the Mystery into the Church Age. Obvious Tribulation application with teachings for the Millennium.