What does 2 Chronicles 11:16 mean?

Anyone from all the tribes of Israel who wanted to worship the Lord, the God of Israel, followed the Levites to Jerusalem to offer sacrifices where the Lord was worshiped, just like their ancestors did. 2 Chronicles 11:16 - Modern Text Bible

(People who still wanted to worship God the old way left their homes and moved to Judah, showing how deep the division had become—not just political, but spiritual.)