What does 2 Kings 21:1-15 mean?

Manasseh was twelve years old when he began to reign, and he reigned fifty-five years in Jerusalem. His mother’s name was Hephzibah. And he did what was evil in the sight of the LORD, according to the despicable practices of the nations whom the LORD drove out before the people of Israel. For he rebuilt the high places that Hezekiah his father had destroyed, and he erected altars for Baal and made an Asherah, as Ahab king of Israel had done, and worshiped all the host of heaven and served them. And he built altars in the house of the LORD, of which the LORD had said, “In Jerusalem will I put my name.” And he built altars for all the host of heaven in the two courts of the house of the LORD. And he burned his son as an offering and used fortune-telling and omens and dealt with mediums and with necromancers. He did much evil in the sight of the LORD, provoking him to anger. And the carved image of Asherah that he had made he set 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 the tribes of Israel, I will put my name forever. And I will not cause the feet of Israel to wander anymore out of the land that I gave to their fathers, if only they will be careful to do according to all that I have commanded them, and according to all the Law that my servant Moses commanded them.” But they did not listen, and Manasseh led them astray to do more evil than the nations had done whom the LORD destroyed before the people of Israel. And the LORD said by his servants the prophets, “Because Manasseh king of Judah has committed these abominations and has done things more evil than all that the Amorites did, who were before him, and has made Judah also to sin with his idols, therefore thus says the LORD, the God of Israel: Behold, I am bringing upon Jerusalem and Judah such disaster that the ears of everyone who hears of it will tingle. And I will stretch over Jerusalem the measuring line of Samaria, and the plumb line of the house of Ahab, and I will wipe Jerusalem as one wipes a dish, wiping it and turning it upside down. And I will forsake the remnant of my heritage and give them into the hand of their enemies, and they shall become a prey and a spoil to all their enemies, because they have done what is evil in my sight and have provoked me to anger, since the day their fathers came out of Egypt, even to this day.”