"Now when all this was finished, all Israel who were present went out to the cities of Judah and broke in pieces the pillars and cut down the Asherim adn broke down the high places and altars...until they had destroyed them all..." 2 Chronicles 31:1
The "this" is the celebration of Passover (cf. 2 Chron. 30). They celebrated God's deliverance of them at the hands of their enemies. They remembered the slavery that sin had had over them. They worshiped their Deliverer, YHWH, God of Israel. In response to this holy worship and remembrance, they looked around and saw multiple idols that they had foolishly trusted in. They destroyed all remnants of their false worship and returned to the LORD.
Let us return to our Lord in such a fashion. Might we measure the "success" of our worship services not on whether they were fun or if we liked them but whether they led us to abandon idols and serve the Living God???