This kind of oppression comes not from an external political authority but from the neighbors. How will this take place? If one is stricken with terrible famine, the neighbors are looked to for offerings of food. The inhabitants of Jerusalem will be oppressed with the requests of their neighbors for food. This is exactly what happened during the first Abomination of Desolation (AD 70):
“…for if so much as the shadow of any kind of food did any where appear, a war was commenced presently, and the dearest friends fell a fighting one with another about it, snatching from each other the most miserable supports of life. Nor would men believe that those who were dying had no food, but the robbers would search them when they were expiring, lest any one should have concealed food in their bosoms, and counterfeited dying; nay, these robbers gaped for want, and ran about stumbling and staggering along like mad dogs, and reeling against the doors of the houses like drunken men; they would also, in the great distress they were in, rush into the very same houses two or three times in one and the same day.” (Josephus, The Wars of the Jews, Book VI, 4:3)
Such incredible hunger will make people look to their neighbors or family for support. However, the siege will be so difficult and the famine so severe, that there will be none willing to provide for friends or neighbors, ’I will not be a healer; for in my house there is neither bread nor clothing; make me not a ruler of the people.’