Remember that the Olivet discourse talks about the 8 signs that Jesus said would lead to the Temple's destruction that were important for the Apostles to recognize
Jesus then mentions in 24:21 the Great Tribulation - which is for the Jesus-movement Jews.
There has never been, nor will there ever be anything rivaling it. The Church was close to being smothered in its cradle if Nero continued and the Jerusalem Christians had not escaped to Pella - this was a tiny community, primarily Jewish and was attacked by both the Roman authorities AND the Jewish authorities. That WAS the great tribulation
THEN, in Matt 24:29 And immediately after the tribulation of those days, the sun shall be darkened and the moon shall not give her light, and the stars shall fall from heaven, and the powers of heaven shall be moved - This is apocalyptic language exactly referring to Isaiah 13:10-13 The stars of the heavens and their constellations will not give their light; the sun will be dark at its rising and the moon will not shed its light... I will make the heavens tremble, and the earth will be shaken out of its place" - Jesus is foretelling the overthrow of nero and the Sanhedrin. He draws a parallel between the shaking of Babylon and the shaking of Jerusalem (and that's the basis of John's vision in the book of revelations)
This is also reflected in Haggai 2:6-7 Thus says that Lord of hosts: Once again, in a little while, I will shake the heavens and the earth and the sea and the dry land; and I will shake all nations, so that the treasures of all nations shall come in, and I will fill this house with splendor, says the Lord of hosts
This splendor is Christ and the house is the Church. The Sanhedrin was uprooted forever, never to be validly re-established again.
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I'm finally answering your question, apologies for the background lenght
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Now to Matt 24:30-31 Then will appear the sign of the Son of man in heaven, and then all the tribes of the earth will mourn, and they will see the Son of man coming on the clouds on heaven with power and great glory; and He will send out his angels with a loud trumpet call, and they will gather His elect from the four winds, from one end of heaven to the other -- and on reading this with Daniel we have
3. Thus were the miserable people persuaded by these deceivers, and such as belied God himself; while they did not attend nor give credit to the signs that were so evident, and did so plainly foretell their future desolation, but, like men infatuated, without either eyes to see or minds to consider, did not regard the denunciations that God made to them. Thus there was a star 20 resembling a sword, which stood over the city, and a comet, that continued a whole year. Thus also before the Jews' rebellion, and before those commotions which preceded the war, when the people were come in great crowds to the feast of unleavened bread, on the eighth day of the month Xanthicus, 21 [Nisan,] and at the ninth hour of the night, so great a light shone round the altar and the holy house, that it appeared to be bright day time; which lasted for half an hour. This light seemed to be a good sign to the unskillful, but was so interpreted by the sacred scribes, as to portend those events that followed immediately upon it. At the same festival also, a heifer, as she was led by the high priest to be sacrificed, brought forth a lamb in the midst of the temple. Moreover, the eastern gate of the inner 22 [court of the] temple, which was of brass, and vastly heavy, and had been with difficulty shut by twenty men, and rested upon a basis armed with iron, and had bolts fastened very deep into the firm floor, which was there made of one entire stone, was seen to be opened of its own accord about the sixth hour of the night. Now those that kept watch in the temple came hereupon running to the captain of the temple, and told him of it; who then came up thither, and not without great difficulty was able to shut the gate again. This also appeared to the vulgar to be a very happy prodigy, as if God did thereby open them the gate of happiness. But the men of learning understood it, that the security of their holy house was dissolved of its own accord, and that the gate was opened for the advantage of their enemies. So these publicly declared that the signal foreshowed the desolation that was coming upon them. Besides these, a few days after that feast, on the one and twentieth day of the month Artemisius, [Jyar,] a certain prodigious and incredible phenomenon appeared: I suppose the account of it would seem to be a fable, were it not related by those that saw it, and were not the events that followed it of so considerable a nature as to deserve such signals; for, before sun-setting, chariots and troops of soldiers in their armor were seen running about among the clouds, and surrounding of cities. Moreover, at that feast which we call Pentecost, as the priests were going by night into the inner [court of the temple,] as their custom was, to perform their sacred ministrations, they said that, in the first place, they felt a quaking, and heard a great noise, and after that they heard a sound as of a great multitude, saying, "Let us remove hence." But, what is still more terrible, there was one Jesus, the son of Ananus, a plebeian and a husbandman, who, four years before the war began, and at a time when the city was in very great peace and prosperity, came to that feast whereon it is our custom for every one to make tabernacles to God in the temple, 23 began on a sudden to cry aloud, "A voice from the east, a voice from the west, a voice from the four winds, a voice against Jerusalem and the holy house, a voice against the bridegrooms and the brides, and a voice against this whole people!" This was his cry, as he went about by day and by night, in all the lanes of the city. However, certain of the most eminent among the populace had great indignation at this dire cry of his, and took up the man, and gave him a great number of severe stripes; yet did not he either say any thing for himself, or any thing peculiar to those that chastised him, but still went on with the same words which he cried before. Hereupon our rulers, supposing, as the case proved to be, that this was a sort of divine fury in the man, brought him to the Roman procurator, where he was whipped till his bones were laid bare; yet he did not make any supplication for himself, nor shed any tears, but turning his voice to the most lamentable tone possible, at every stroke of the whip his answer was, "Woe, woe to Jerusalem!" And when Albinus [for he was then our procurator] asked him, Who he was? and whence he came? and why he uttered such words? he made no manner of reply to what he said, but still did not leave off his melancholy ditty, till Albinus took him to be a madman, and dismissed him. Now, during all the time that passed before the war began, this man did not go near any of the citizens, nor was seen by them while he said so; but he every day uttered these lamentable words, as if it were his premeditated vow, "Woe, woe to Jerusalem!" Nor did he give ill words to any of those that beat him every day, nor good words to those that gave him food; but this was his reply to all men, and indeed no other than a melancholy presage of what was to come. This cry of his was the loudest at the festivals; and he continued this ditty for seven years and five months, without growing hoarse, or being tired therewith, until the very time that he saw his presage in earnest fulfilled in our siege, when it ceased; for as he was going round upon the wall, he cried out with his utmost force, "Woe, woe to the city again, and to the people, and to the holy house!" And just as he added at the last, "Woe, woe to myself also!" there came a stone out of one of the engines, and smote him, and killed him immediately; and as he was uttering the very same presages he gave up the ghost.
You prove my point.