Yahweh has accomplished his wrath, he has poured out his fierce anger; He has kindled a fire in Zion, which has devoured the foundations of it.
"They respected not the persons of the priest, they favored not the elders"  (Lamentations 4:16b).  The indication here is that the whole population were caught up in the wholesale iniquity that led to Israel's defeat and deportation to Babylon.  It was not merely the sins of false prophets and priests, but the general wickedness of the whole nation that led to God's destruction of the "sinful kingdom."