A sadder take on this king than in Kings. At 7 he became king, having lived his childhood hidden in the temple. Under the influence of his mentor/ priest, he reigns as a lover of God for many years and rebuilds the temple.
When the old mentor/father figure/priest dies king Joash comes under the influence of the local rulers of towns in his kingdom, who don’t necessarily believe Jehovah. They reestablish the folk religions and Baal worship.
The new priest Zechariah, son of king joash’s mentor, condemns this, but the king is persuaded to turn on the priest and he is stoned to death.
In these times God’s judgement is concrete and direct. Invaders come and smash Judah as punishment for rejecting God. The rulers are killed, king Joash is wounded, and vulnerable to a court conspiracy. He’s killed and ignominiosly buried.
The king was weak, the rebuilding of the temple and reestablishing the religion, happened because the mentor priest, Jehoaida, was effectively ruling. He bent like a reed when other influences got to him.
The king was bought up in the temple. The Jesuits said ‘ give me a child until they are 7 and we’ll have them for life’ but it wasn’t true in this story and it’s not true now. The church needs to rely on much more than inheritance and culture to thrive.