12 The kings of the earth, and all the inhabitants of the world, would not have believed that the adversary and the enemy should have entered into the gates of Jerusalem.
Here is shown the fact (of the destruction) to be awesome. Since, first it was incredible. As said: "The kings of the earth did not believe or any of the inhabitants of the world," That is, since there had been powerful kings over this city, (Jerusalem). And: "that foe": openly violent, or "enemy": falsely hidden. As Isaiah 23:1 states: "The oracle concerning Tyre. 'Wail, O ships of Tarshish, for Tyre is laid waste, without house or haven! From the land of Cyprus it is revealed to them." And also Isaiah 30:13: "whose crash comes suddenly, in an instant."
[AD 1274] Thomas Aquinas on Lamentations 4:12