People sinned against God by worshiping false gods at their altars. Here "punish the altars" represents punishing the people by destroying their altars. Alternate translation: "I will also destroy the altars at Bethel" (See: [[rc://en/ta/man/jit/figs-metonymy]])
This can be stated in active form. Alternate translation: "Your enemies will cut off the horns of the altars, and the horns will fall to the ground" (See: [[rc://en/ta/man/jit/figs-activepassive]])
People worshiped false gods at their altars. At the top corners of the altars there were pieces of metal shaped like bull horns. These horns were a symbol of the strength of their gods.