The inevitable collapse of idol worship brings not only physical ruin but also a profound sense of abandonment, shame, and terror. Places that once bustled with human activity will transform into absolute wastelands.
This destruction begins with the high places of sin, bringing them to absolute ruin [מצודת ציון]. The primary approach among commentators is that these refer to the altars in the city of Beit El, which served as the center of sin and idolatry for the Israelites [רש״י, רד״ק, מצודת דוד, ביאור שטיינזלץ]. This eradication specifically targets the altars of the Baals, which will be completely wiped out alongside the removal of the golden calves [אבן עזרא].
In the aftermath of this ruin, thorns and thistles will overgrow the once-revered sites. The commentators agree that this wild growth represents total abandonment. Because the idol worshippers will be exiled from their land, no one will remain to visit these altars. Left completely desolate, the monuments will simply be swallowed by weeds [רש״י, מצודת דוד, רד״ק, מלבי״ם].
The devastation culminates in a dramatic plea for the mountains to cover them and the hills to fall upon them. The primary approach among commentators is that the Israelites, or the idol worshippers themselves, are the ones crying out. Some explain that this plea is born of deep shame; they beg the mountains to hide them so their enemies will not see their disgrace [רש״י, מצודת דוד]. Others understand the cry as a reaction to unprecedented terror and distress. Overwhelmed by suffering, the people would rather have the mountains and hills collapse and bury them alive than endure further agony, or they desperately seek a final shelter as everything around them crumbles [רד״ק, אבן עזרא, ביאור שטיינזלץ].
Alternatively, a metaphorical interpretation suggests that the altars and high places themselves are speaking. These structures, which once stood proudly upon the hills, will beg the mountains to collapse and bury them under piles of dirt so they are never seen again. This dramatic collapse from sheer desolation highlights just how foolish and utterly useless the practices of the idol worshippers truly were [אבן עזרא, מלבי״ם].