Matthew 24:1-35 was fulfilled in the first century'
Mathew 24:30 all the tribes of the earth
Mark 13:25
Luke 21:36
Also, this prophecy has to do with his return and the separation of the sheep and the goats associated with his return—which did not happen back then but some parts of the prophecy like the disgusting thing did happen back then. So how can we harmonize and reconcile all these scriptures? Like the prophecy of Jesus coming on a colt and with the clouds of heaven, the prophecy has a dual fulfillment one in 70 and again 1914.