So all the people went to the temple of Baal and tore it down. They smashed the altars and idols to pieces and killed Mattan the priest of Baal in front of the altars.
Here we have, I. The people pleased, Ch2 23:12, Ch2 23:13. When the king stood at his pillar, whose right it was to stand there, all the people of the land rejoiced to see a rod sprung out of the stem of Jesse, Isa 11:1.
Commenting on 2 Chronicles 23:12-21
Then all the people went to the house of Baal, and brake it down, and brake his altars and his images in pieces, and slew Mattan the priest of Baal before the altars. (l) According to their covenant made to the Lord. (m) As the Lord commanded in his law both for the person and also the city, .
Mattan the priest - The Targum will not prostitute the term priest, but calls him כומרא cumera, priestling.