17 That's why the Master lost interest in the young men, had no feeling for their orphans and widows. All of them were godless and evil, talking filth and folly. And even after that, he was still angry, his fist still raised, ready to hit them again. 18 Their wicked lives raged like an out-of-control fire, the kind that burns everything in its path - Trees and bushes, weeds and grasses - filling the skies with smoke. 19 God-of-the-Angel-Armies answered fire with fire, set the whole country on fire, Turned the people into consuming fires, consuming one another in their lusts - 20 Appetites insatiable, stuffing and gorging themselves left and right with people and things. But still they starved. Not even their children were safe from their rapacious hunger.
Matthew Henry's Commentary on Isaiah 9:17-20
Commentary on Isaiah 9:8-21
(Read Isaiah 9:8-21)
Those are ripening apace for ruin, whose hearts are unhumbled under humbling providences. For that which God designs, in smiting us, is, to turn us to himself; and if this point be not gained by lesser judgments, greater may be expected. The leaders of the people misled them. We have reason to be afraid of those that speak well of us, when we do ill. Wickedness was universal, all were infected with it. They shall be in trouble, and see no way out; and when men's ways displease the Lord, he makes even their friends to be at war with them. God would take away those they thought to have help from. Their rulers were the head. Their false prophets were the tail and the rush, the most despicable. In these civil contests, men preyed on near relations who were as their own flesh. The people turn not to Him who smites them, therefore he continues to smite: for when God judges, he will overcome; and the proudest, stoutest sinner shall either bend or break.