Verse 2 – We are told in this verse, that Manasseh did evil, but to what depths his evil goes is beyond description. He adopted the wicked practices of the Babylonians and Canaanites including sacrificing his own son.
Verses 3-6 – Manasseh restored the high places including illegal shrines, that Hezekiah had suppressed, and those altars devoted to other pagan deities. Recent scholars have taken the word mediums as referring to a ritual pit for bringing up spirits.
(6) This verse says Manasseh provoked God to anger. Why? Because sorcery, divination, and consulting mediums and spiritualists are occult practices. Leviticus 19:31; and Deuteronomy 18:9-13 demonstrate a lack of faith in God All Mighty. These practices open the door to demonic influences. They are counterfeits of Gods power. We don’t need to talk to the dead and any future you need to know about yourself is found in the Word of God.
Verse 7 – Asherah was a Canaanite mother-goddess, a mistress of Baal. Her images were made of wood (Exodus 34:13 and Deuteronomy 12:3 forbids the associate with Asherah practices in any way).
Verses 10-14 – Just as Manasseh’s list of sins is the longest of the kings of Judah, the judgment of those sins is one of the longest in the individual records. God was saying that He would destroy Jerusalem as He did Samaria and the house of Ahab.
Verse 16 – Tradition says that during Manasseh’s massive slaughter, Isaiah was sawed in two when trying to hide in a hollow log (see Hebrews 11:37, 38).
Verses 19-26 – Manasseh dies, and Amon his son, is made king. Amon reigns two years and then his own servants conspired and killed him in his own house. Then the people of the land executed those that killed Amon and made his son Josiah king.