“And in the time of his distress did he trespass yet more against the LORD: this is that king Ahaz. For he sacrificed unto the gods of Damascus, which smote him: and he said, Because the gods of the kings of Syria help them, therefore will I sacrifice to them, that they may help me. But they were the ruin of him, and of all Israel. And Ahaz gathered together the vessels of the house of God, and cut in pieces the vessels of the house of God, and shut up the doors of the house of the LORD, and he made him altars in every corner of Jerusalem. And in every several city of Judah he made high places to burn incense unto other gods, and provoked to anger the LORD God of his fathers.” 2 Chronicles 28:22-25 (KJV)
Ahaz was an evil king of Judah. He was in distress, and against the only, and Holy God of Judah and Israel; and the world for that matter. He had sacrificed his sons to fire according to the ways of those who had been driven out of Canaan (28:3). He had no heart for the LORD.
You may wonder why this is titled “Worshipping Demons”. It is because of what he apostle Paul says,
“What say I then? That the idol is any thing, or that which is offered in sacrifice to idols is any thing? But I say, that the things which the Gentiles sacrifice, they sacrifice to devils, and not to God: and I would not that ye should have fellowship with devils. Ye cannot drink the cup of the Lord, and the cup of devils: ye cannot be partakers of the Lord’s table, and of the table of devils. Do we provoke the Lord to jealousy? Are we stronger than He?” 1 Corinthians 10:19-22
The worship of any “god” other than Jehovah through His Son Jesus Christ, and His atoning blood is demon worship.
If that offends you, then repent of your sins and turn to the One who died for your sins, was buried and rose again, and He will forgive your sins and give you eternal life in the presence of holy GOD.