And they brake down the image of Baal - The other images, it appears, were not images of Baal, but of inferior deities. The image of Baal, which was “broken down,” and not burned, would seem to have been of stone, perhaps erected in front of the temple.
Related Commentaries of 2 Kings 10:27
2 Kings 10:27
27 And they brake down the image of Baal, and brake down the house of Baal, and made it a draught house unto this day.