I like Mauro on this. Drawn from 'The Seventy Weeks and the Great Tribulation' by Phillip Mauro:
“SELF-INFLICTED SUFFERINGS
In the light, therefore, of this comparison of scripture with scripture, we think it plain that the "great tribulation" of Matthew 24:14 was that unparalleled calamity, with its unspeakable sufferings, which befell the city and people in A.D. 70.
In the history of "The Wars of the Jews" by Josephus we have a detailed account, written by an eye witness, of the almost unbelievable sufferings of the Jews during the siege of Jerusalem. To this account we will refer later on; but we wish to state at this point that the distresses of those who were hemmed in by the sudden appearance of the Roman armies were peculiar in this respect, namely, that what they endured was mainly self-inflicted. That is to say, they suffered far more from cruelties and tortures inflicted upon one another, than from the common enemy outside the walls. In this strange feature of the case it was surely "a time of trouble such as never was since there was a nation, even to that same time" (#Da 12:1).
What went on within the distressed city calls to mind the words of Isaiah:
"Through the wrath of the Lord of hosts is the land darkened, and the people shall be as the fuel (the food) of the fire. No man shall spare his brother. And he shall snatch on the right hand and shall be hungry; and he shall eat on the left hand and not be satisfied; they shall eat every man the flesh of his own arm. Manasseh, Ephraim; and Ephraim, Manasseh. For all this His anger is not turned away, but His wrath is poured out still" ([HASHTAG]#Isa[/HASHTAG] 9:19-21).” Mauro, Chap 13, 70 Wks.