The MAIN idea behind the Millennial Period is God's purpose to restore his holy name.
Paul accused his people of blaspheming the name of God among the Gentiles.
Romans 2:24 For “the name of God is blasphemed among the Gentiles because of you,” just as it is written.
When did this take place?
Ezekiel 36:20 When they came to the nations where they went, they profaned My holy name, because it was said of them, ‘These are the people of the Lord; yet they have come out of His land.’
God plans to vindicate the holiness of his name.
Ezekiel 36: 22-23 “Therefore say to the house of Israel, ‘Thus says the Lord God, “It is not for your sake, O house of Israel, that I am about to act, but for My holy name, which you have profaned among the nations where you went. I will vindicate the holiness of My great name which has been profaned among the nations, which you have profaned in their midst. Then the nations will know that I am the Lord,” declares the Lord God, “when I prove Myself holy among you in their sight.
This prophecy was not yet fulfilled during the time of Jesus.
Matthew 6:9 Pray, then, in this way: "Our Father who is in heaven, Hallowed be Your name.
How does God uphold the holiness of His name? The process will be a mirror image of how His name was dishonored among the nations. Because the people came out of the land due to disobedience and idolatry, He will bring them back. Additionally, He will pour out His Spirit into their hearts, enabling them to willingly and gratefully follow His commandments. He will bring the nations against them again, but this time he will protect Israel from her enemies, thus proving himself holy among the people of Israel in the sight of the nations.
The time when Gentile nations will observe Israel living in the land of promise as a holy and righteous people is known as the Millennial period. During that time, they will keep all of the commandments and obey Moses.
Malachi 4:4 “Remember the law of Moses My servant, even the statutes and ordinances which I commanded him in Horeb for all Israel.
At that time, Israel will offer sacrifices.
Jeremiah 33:16-18 In those days Judah will be saved and Jerusalem will dwell in safety; and this is the name by which she will be called: the Lord is our righteousness.’ For thus says the Lord, ‘David shall never lack a man to sit on the throne of the house of Israel; and the Levitical priests shall never lack a man before Me to offer burnt offerings, to burn grain offerings and to prepare sacrifices continually.’”