He also burned the bones of the priests on their altars and cleansed Judah and Jerusalem.
Concerning Josiah we are here told, 1. That he came to the crown when he was very young, only eight years old (yet his infancy did not debar him from his right), and he reigned thirty-one years (Ch2 34:1), a considerable time.
Commenting on 2 Chronicles 34:1-7
And so did he in the cities of Manasseh, and Ephraim, and Simeon, even unto Naphtali,.... Which though they belonged to the ten tribes, yet these being carried captive by the king of Assyria, they that were left became subject to the kings of Judah; see Gill on Kg2 23:19, with their mattocks round about; or hammers or mauls, as Kimchi, or pick axes, such...
he burnt the bones of the priests upon their altars--A greater brand of infamy could not have been put on idolatrous priests than the disinterment of their bones, and a greater defilement could not have been done to the altars of idolatry than the burning upon them the bones of those who had there officiated in their lifetime.