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If your point is that because John said this it was after AD 70, I believe you the evidence points to the fact that John wrote the Revelation prior to AD 70. Here is the internal evidence.
The book of Revelation was written while the temple was still standing. The temple and the city of Jerusalem were both completely destroyed in the year AD70, fulfilling the prophecy Jesus gave in Matthew 24 that not one stone would be left upon another (Matt 24:2). How do we know this? We know this from what the book itself says. If we look at Revelation 11:1-2 it says:
Rev 11:1 Then I was given a measuring rod like a staff, and I was told, “Rise and measure the temple of God and the altar and those who worship there, but do not measure the court outside the temple; leave that out, for it is given over to the nations, and they will trample the holy city for forty-two months.

This tells us that the temple was located in the Holy City which is Jerusalem and that it “will be” trampled on or completely destroyed over a period of forty two months. The writer did not say that it “had already been” trampled on for 42 months. We know from secular history including the writings of Josephus that this did in fact occur in the year AD70 and it did in fact take a period of 42 months for it to occur, thus fulfilling the prophecy herein written. Since we realize that it would have been impossible to measure the temple unless it was still standing, we see that verse 11 gives us the time frame. Verse 12 confirms it by stating that this temple would be trampled for a period of 42 months, precisely coinciding with the record of secular history.
This passage is paralleled in Luke 21:24 where Jesus himself says:
Luk 21:24 They will fall by the edge of the sword and be led captive among all nations, and Jerusalem will be trampled underfoot by the Gentiles, until the times of the Gentiles are fulfilled.