What is the meaning of 2 Kings 21:1-18?

1 Manasseh was twelve years old when he began to reign, and reigned fifty and five years in Jerusalem. And his mother’s name was Hephzibah. 2 And he did that which was evil in the sight of the LORD, after the abominations of the heathen, whom the LORD cast out before the children of Israel. 3 For he built up again the high places which Hezekiah his father had destroyed; and he reared up altars for Baal, and made a grove, as did Ahab king of Israel; and worshiped all the host of heaven, and served them. 4 And he built altars in the house of the LORD, of which the LORD said, In Jerusalem will I put my name. 5 And he built altars for all the host of heaven in the two courts of the house of the LORD.

6 And he made his son pass through the fire, and observed times, and used enchantments, and dealt with familiar spirits and wizards: he wrought much wickedness in the sight of the LORD, to provoke him to anger. 7 And he set a graven image of the grove that he had made in the house, of which the LORD said to David, and to Solomon his son, In this house, and in Jerusalem, which I have chosen out of all tribes of Israel, will I put my name for ever: 8 Neither will I make the feet of Israel move any more out of the land which I gave their fathers; only if they will observe to do according to all that I have commanded them, and according to all the law that my servant Moses commanded them.

 9 But they hearkened not: and Manasseh seduced them to do more evil than did the nations whom the LORD destroyed before the children of Israel. 10 And the LORD spake by his servants the prophets, saying, 11 Because Manasseh king of Judah hath done these abominations, and hath done wickedly above all that the Amorites did, which were before him, and hath made Judah also to sin with his idols: 12 Therefore thus saith the LORD God of Israel, Behold, I am bringing such evil upon Jerusalem and Judah, that whosoever heareth of it, both his ears shall tingle. 13 And I will stretch over Jerusalem the line of Samaria, and the plummet of the house of Ahab: and I will wipe Jerusalem as a man wipeth a dish, wiping it, and turning it upside down. 14 And I will forsake the remnant of mine inheritance, and deliver them into the hand of their enemies; and they shall become a prey and a spoil to all their enemies;

15 Because they have done that which was evil in my sight, and have provoked me to anger, since the day their fathers came forth out of Egypt, even unto this day. 16 Moreover Manasseh shed innocent blood very much, till he had filled Jerusalem from one end to another; beside his sin wherewith he made Judah to sin, in doing that which was evil in the sight of the LORD. 17 Now the rest of the acts of Manasseh, and all that he did, and his sin that he sinned, are they not written in the book of the chronicles of the kings of Judah? 18 And Manasseh slept with his fathers, and was buried in the garden of his own house, in the garden of Uzza: and Amon his son reigned in his stead. (2 Kings 21:1-18)

Jamieson Fausset Brown Commentary

2Ki 21:1-18. MANASSEH’S WICKED REIGN, AND GREAT IDOLATRY.

1-3. Manasseh was twelve years old when he began to reign–He must have been born three years after his father’s recovery; and his minority, spent under the influence of guardians who were hostile to the religious principles and reforming policy of his father, may account in part for the anti-theocratic principles of his reign. The work of religious reformation which Hezekiah had zealously carried on was but partially accomplished. There was little appearance of its influence on the heart and manners of the people at large.

On the contrary, the true fear of God had vanished from the mass of the people; corruption and vice increased, and were openly practised (Isa 28:7, &c.) by the degenerate leaders, who, having got the young prince Manasseh into their power, directed his education, trained him up in their views, and seduced him into the open patronage of idolatry. Hence, when he became sovereign, he introduced the worship of idols, the restoration of high places, and the erection of altars or pillars to Baal, and the placing, in the temple of God itself, a graven image of Asherah, the sacred or symbolic tree, which represented “all the host of heaven.” This was not idolatry, but pure star-worship, of Chaldaic and Assyrian origin [KEIL].  The sun, as among the Persians, had chariots and horses consecrated to it (2Ki 23:11); and incense was offered to the stars on the housetops (2Ki 23:12; 2Ch 33:5; Jer 19:13; Zep 1:5), and in the temple area with the face turned toward the sunrise (Eze 8:16).