One of the sins that stood out to me among the rest was when Jeroboam made the two idols to replace the worship of God in 1 Kings 12. He cast two golden calves and if that wasn’t enough, the way he introduces them to the people is a great offense to the name of God.
If you’ve noticed through reading the Old Testament there are a couple of ways that God is frequently named. One is the God of Abraham, Isaac, and Jacob and the other is a reference to one of the defining moments in the history of God’s people. God is the one who delivered his people out of Egypt.
Jeroboam is fearful that if the people worship the true God at Jerusalem that they will turn from him and that he will lose his power. He cares more for his own security than the honor of God and he will do anything to keep it that way, even offending God with some divine identity theft.
And Jeroboam said in his heart, “Now the kingdom will turn back to the house of David. If this people go up to offer sacrifices in the temple of the Lord at Jerusalem, then the heart of this people will turn again to their lord, to Rehoboam king of Judah, and they will kill me and return to Rehoboam king of Judah.” So the king took counsel and made two calves of gold. And he said to the people, “You have gone up to Jerusalem long enough. Behold your gods, O Israel, who brought you up out of the land of Egypt.” And he set one in Bethel, and the other he put in Dan.
1 Kings 12:26-29
Jeroboam makes dead idols to build up his power, to steal Israel’s worship from God, and he then takes the truth of God and projects it onto two calves of gold.* The truth is that their God, Yahweh, is the one who with his mighty hand delivered the people from Egypt. If not for God’s choosing of Israel there would be no land for Jeroboam to rule. God is the one who has won for his people the victory and built them up into a nation to rival any in the land. But in a selfish play for power Jeroboam will turn from truth and instead ascribe God’s work to idols, and seek to bring Israel to worship them.
He is not only sinning against God by turning away from him, he is offending God’s name by saying these idols are the redeemers of Israel, and then he leads his nation into this sin. Those who have such influence are held accountable and this sin does not go unnoticed.
*Taking a page out of Aaron’s playbook in Exodus 32.
Year in the Bible 
what was the name of the two calfs