The Philistines had 5 major cities along the Mediterranean coast, west of Judah. The only city not mentioned here was Gath that had been wiped out by the Syrian King Hazael. Otherwise, Yahweh was going to punish the other 4 cities. Gaza was cited as the worst, since the numbering iniquities were about 3 and 4 things, just like the numerical Proverbs, chapter 30. Yahweh was not going to revoke his punishment against them. They were involved in the slave trade with Edom that sent whole communities into exile. Although fire would come to Gaza, Yahweh reminded them that Ashdod, Ashkelon, and Ekron would also suffer. All the remaining Philistines would perish or die. This was clearly an oracle of Yahweh.
Outsiders will occupy Jerusalem. Yahweh was going to turn his face away from the inhabitants of the holy city. Thus these outsiders would profane the treasured places of Jerusalem. Violent wicked people would enter the holy city and desecrate it. The people of Jerusalem would be captured. They would be forced to make a chain, and to be put in chains. The land would be full of bloody crimes. The city would be full of violence. Yahweh was going to bring the worst of the nations to take possession of their houses. Yahweh was going to put an end to the arrogant and strong ones of the city, while their holy places would be profaned.