A light has just come on in my noggin!
For weeks now I have been baffled by this debate between people who normally are in agreement here. Sometimes it is difficult to truly understand what others are thinking, no matter how much you read their posts. Here is what is hanging us up:
Some here are viewing the millenial reign as the same event as the Lord's Kingdom. - This is wrong, apples and oranges = fruit salad. - The Lord's Kingdom is eternal, and it did indeed begin 2000 years ago, but it is not the same as the millenial reign. - The millenial reign is a one day (one day = 1000 years) event here on Earth that has been foretold by the prophets of the OT as well as Peter, Paul and John. - Paul placed no definate length on it, while John gives it as 1000 years, and Peter, somewhat cryptically tells us that it will be 1000 years, but the point is that it is not the Kingdom. When it's over, it's over! OK?
What you are really saying is that there are two aspects to the Kingdom.
There is the Kingdom of God which is a Spiritual kingdom (Rom.14:17) and the Kingdom of Heaven, a literal, physical kingdom, only mentioned to Israel in the book of Matthew as Christ was their Messiah.
The Kingdom of God is being built by the growth of the body of Christ the Church.
The Kingdom of Heaven, the literal physical rule of Christ as the Son of David will happen when He returns (Rev.19) and sets up His Millennial rule with His Church (His Bride)