The two accounts are of the same event. The narrative has prophetic meaning since it pointed to events in the near future from Jesus and His disciples’ perspective. "This generation will by no means pass away till all things take place." Jesus foretold the destruction of the temple and the end of the old covenant system, which we know happened in AD70 when the armies of Rome trampled Jerusalem underfoot and leveled the temple. It has not prophetic significance from our perspective, Jesus was not speaking directly to us.
The futurists need to jump through all kinds of hoops to resurrect the Roman empire and rebuild the temple so it can be destroyed again simply because they deny the parallel between Matthew 24 and Luke 21.
BTW, I might add that many futurists recognize the foolishness of trying to claim that Matthew 24 has no real relationship to AD70, so they have invented the theory that it has two fulfillments, once in AD70 and once at the end of the age.
Of course they still need to resurrect Rome, rebuild the temple, etc. That’s what gets John Hagee and his friends all excited about events in the Middle East. They are looking intently for a revived Rome and the rebuilt temple which will signal the soon annihilation of millions of Israeli citizens under their Antichrist.
I’ll take a pass on their brand of theology.
At least us “replacement theologians” not out to see most of the Jewish population killed off.
All we can offer them is the hope of the gospel, being regrafted into the root, identifying with our father Abraham, and sharing in the promises that have been secured by Messiah Jesus. The only place we can offer them is the New Jerusalem in heaven where all the saints of God are now reigning with Him.
The real thing we “replace” is the abject pessimism of futurist dispensationalism with an optimistic expansion of Christ’s kingdom today and until He returns. This is real good news for both “Jew and greek”.