What Jeroboam did was sinful. And it caused Israel to sin. The people came to worship the statue at Bethel. They went all the way to Dan to worship the statue that was there.
All of that was the great sin the royal family of Jeroboam committed. It led to their fall from power. Because of it, they were destroyed from the face of the earth.
The Lord took control of Israel away from the royal house of David. The Israelites made Jeroboam, the son of Nebat, their king. Jeroboam tried to get Israel to stop following the Lord. He caused them to commit a terrible sin.
But Jehu wasn’t careful to obey the law of the Lord. He didn’t obey the God of Israel with all his heart. He didn’t turn away from the sins of Jeroboam. Jeroboam had caused Israel to commit those same sins.