the nation does not believe in Jesus as the Messiah
True. But they will one day.
So, we should recognize that the Gentile Times, as defined in Luke 21, practically ended in 1948
I would say that Jerusalem is still being "stepped on" disrespectfully by Gentiles. - "Jerusalem shall be trodden down of the Gentiles, until the times of the Gentiles be fulfilled."
Moslems run the temple mount. A temple to a false God is on the temple mount now.
it practically proves that the author wrote this Gospel after 70 AD.
Where is the 1st and 2nd century historical outcry charging that this was written after the fact?
Revelation 11:1-2 explains when the times of the Gentiles will come to an end:
And there was given me a reed like unto a rod: and the angel stood, saying, Rise, and measure the temple of God, and the altar, and them that worship therein. But the court which is without the temple leave out, and measure it not; for it is given unto the Gentiles: and the holy city shall they tread under foot forty and two months.
Remember, Jerusalem will be trodden down of the Gentiles until the times of the Gentiles are fulfilled. This passage tells us that the Gentiles will tread the holy city under foot for forty-two Jerusalem months. Forty-two months here refers to the (2nd half of the final week in Daniels 70 week prophecy) three and one half year period known as the great tribulation, which immediately precedes the battle of Armageddon.
In Revelation 13:5, we are told that power was given to the beast (the Antichrist) to continue forty two months. This is the same forty two months that will conclude the times of the Gentiles.