Bible Notes Online - 2-Kings 16 - ESV
Commentary

v1-4: Ahaz promoted sin, following the example of the kings of Israel. Worse, we read, he "even sacrificed his son in the fire," following the evil practices of the Canaanite nations. His idolatrous practices were witnessed everywhere.

v5-6: Syria and Israel continued to attack Judah, see 15.37. They could not overcome Jerusalem (Is 7.1). Their plan was to set a king over Judah (see Is 7.6). This plan would not happen, for God spoke against it (Is 7.7).

God promised that "Ephraim will be broken" (Is 7.8); God gave a maximum of 65 years, and a command to "stand firm in your faith;" but Israel was captured by Assyria less than 20 years later. (Ahaz ruled for 11 years, when Hoshea became king of Israel, and he reigned for 9 years.)

v7-9: Ahaz also paid money to Tiglath-Pileser, relying on human wisdom. His scheme worked, in that Assyria defeated Aram. But this does not prove that what Ahaz did was right. Tiglath-Pileser killed Rezin king of Aram, but deported the people of Damascus to Kir, a practice he continued later, see 17.6, and 17.24 were he brought other peoples to live in Samaria.

v10-14: Ahaz met Tiglath-Pileser at Damascus, the capital city of Aram. They made an alliance.

Upon seeing the altar at Damascus, Ahaz had a copy made for the temple, to displace the old one. He began to copy aspects of false religion, and reject the revealed religion from God.

v15-16: Ahaz knew about the various offerings, but he was wrong to change the worship of God. Uriah the priest was party to this 'sacrilege'; he could and should have resisted these changes. The bronze altar, which had been in front of the temple (v14) was moved, and used for "seeking guidance." This is some sort of talisman, hoping to gain God's blessings, although rejecting other aspects of true worship. We cannot 'pick and choose' the commands of God.

v17-18: On account of the king of Assyria, Ahaz changed many things pertaining to the worship of God. How many wrong things do we do because we fear man more than we love God?

v19-20: Ahaz was followed by Hezekiah, and the spiritual condition of Judah swung again, as it would later, with Manasseh and Josiah.