Commentaries:
Manasseh was the son of the second or third best king that Judah ever had. A list of the three best kings of Judah, hands down, begins with David, and he stands in a class of his own because every king is compared to him, even the good ones. He is the standard. Only three other kings are compared favorably to David: Jehoshaphat, Hezekiah, and Josiah. God seems to draw special attention to Josiah as having been the second best, with Hezekiah being the third, and Jehoshaphat the fourth. That is my own list, but it has sound biblical reasoning behind it.
John W. Ritenbaugh
Why Three Kings Are Missing From Matthew 1
It would be hard to name a king of Israel or Judah who led his nation into more evil. Yet, incredible as it is, God's Word reveals that Manasseh repented of much of it. His repentance was not a hollow one. He changed so completely that he did a complete turn-around, tearing down the idols he had erected previously and making God's commanded sacrifices at the Temple. Nowhere is he directly evaluated as doing good in God's sight, but he did some good works to clean up some of the evil mess he had created. God's evaluation of him seems to be softened considerably, considering what could have been recorded.
John W. Ritenbaugh
Leadership and Covenants (Part One)
King Manasseh devastated the worship of the true God. As usually happens when the leadership is corrupt, the nation fell apart as well. What God has recorded here has New Covenant significance. Though this happened carnally to the people under the Old Covenant, they were recorded for the admonition of those under the New Covenant (I Corinthians 10:11). The same mistakes must not be repeated.
John W. Ritenbaugh
Guard the Truth!
Manasseh was the son of Hezekiah, probably the third best king that Judah ever had. In my mind, the four best kings of Judah were David—the standard who stands in a class of his own as Scripture compares every king to him, even the good ones—Josiah, Hezekiah, and Jehoshaphat, in that order. The Bible compares only these last three kings favorably to David. Manasseh, then, grew up under one of the best kings, Hezekiah.
Judah became worse under this wicked man than all of the pagan peoples whom God had sent Israel into the land to destroy—the Canaanites, the Hivites, the Hittites, etc. Manasseh seduced Judah using astrology, spiritism, witchcraft, human sacrifice, pagan altars, and idol groves. He destroyed all of Hezekiah's good works. Most surprising of all, he repented in captivity! Apparently, because of his former evils, he was not buried with the kings of Judah.
John W. Ritenbaugh
Three Missing Kings (Part One)