The kingdom of God comes to earth with the Messiah.
When Jesus appeared as the 'anointed David', the servant of God, he was not recognised by the Jewish religious authorities. This was not the man they expected to be King of the Jews.
Many Gentiles, on the other hand, do see the coming of Jesus Christ as the appearance of the 'Holy One'. The witnesses to Jesus' resurrection, and subsequent ascension to heaven, were justified in their belief by the outpouring of the Holy Spirit at Pentecost. This baptism continues to be a personal, and communal, evidence of Jesus' majesty even to this day.
The point about the coming of the Holy Spirit, foreshadowed in the festival of Shavuot, is that it brings a person into the immediate presence of God's Spirit. The Spirit that fills a person is the Spirit of Christ, the righteousness of God. So, living by grace is not lawlessness! It is living according to the righteous fulfilment of the law - the Spirit of love. Grace is not lawlessness. Fulfilment of the law is not the same as abolition of the law.
There are two kingdoms, the kingdom which was manifested when Yeshua told his disciples go to the lost sheep of Israel, to heal the sick, raise the dead, to show that the kingdom of heaven is at hand, whereas it was power and spirit displayed by the disciples. The kingdom of God, whereas Judah and Ephraim/Israel will be joined and live on the land given to Jacob (Ezekiel 37), under the kingship of David, is behind the door, and has not been fulfilled (Matthew 24:29:31). Per Jeremiah 16:16, "I am going to send for many fishermen" to fish for Israel, the lost sheep of Israel, and later will send out hunters of men for them, to bring them to their own land, but first make them pay doubly for their iniquity, which is what Judah, the Jews, have been paying (Hosea 5), such as 6 million Jews lost in WWII, but the lost tribes of Israel, who Yeshua sent disciples to preach the kingdom, have not been restored to their own land with a new heart and spirit, whereas they will keep my ordinances (Ezekiel 36:24-29). There is no "majesty" of the "Christian" community. The US government's Roman Catholic leadership is behind the killing of the innocent unborn. That will lead to judgment for the whole country, or in words of Jeremiah 16:18, "I will first doubly repay their iniquity, and their sin. At the time the lost tribes are gathered out of the nations (Ezekiel 36:24), the nations/Gentiles will come and say, "Our fathers have inherited nothing but falsehood" (Jeremiah 16:19).
New American Standard Bible Jeremiah 16:16
“Behold, I am going to send for many fishermen,” declares the LORD, “and they will fish for them; and afterward I will send for many hunters, and they will hunt them from every mountain and every hill and from the clefts of the rocks.
Keep in mind that Shavuot is the 16th of May 2021, and Pentecost is the 23rd of May 2021. The two are not the same. The Council of Nicaea purposefully changed the date of the last supper, the Feast of Unleavened Bread, to a date corresponding to the Feast of Astarte (Easter), the queen of heaven, which is not the date of Passover, or the Feast of Unleavened Bread, which offsets your Pentecost date to be contingent on a pagan festival. These are the kind of abominations which will result in a double repay for Israel's iniquity. (Jeremiah 16:18).