What the Bible says about Destruction of Pagan Altar
(From Forerunner Commentary)
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)