New Defender's Study Bible Notes
6:3 to the mountains. The topography of Israel is thus personified in the idolatrous altars and rituals that had been established throughout the land. God’s judgment was not against these physical entities per se, of course, but against those men and women who had polluted the beautiful land with their pagan adulteries.
6:4 altars shall be desolate. Both Israel and Judah had long been enamored of the images and idols of the pagan nations around them, but the Babylonians destroyed them along with their holy temple. As far as we know, the children of Israel never again lapsed into pagan idolatry and its gross practices after their return from captivity. They had learned that lesson the hard way. Instead they drifted into the sins of legalism, rationalism, and materialism.
6:6 high places shall be desolate. The children of Israel had been commanded to destroy the high places of the Canaanites (Numbers 33:52); instead they had built still more.
6:7 ye shall know that I am the LORD. See also Ezekiel 6:10,13,14. This phrase occurs more than sixty times in Ezekiel, underscoring the importance of its truth. The basic purpose of God’s judgments against those who have rebelled against Him (including Satan at the head of the list) is to show His creatures who created them.