The words “they also” are emphatic. Not only did the Israelites make themselves high places 1Ki 12:31; 1 Kings 13:32, but the people of Judah also. The “high places,” which are said to have been “built,” were probably small shrines or tabernacles hung with bright-colored tapestry Ezekiel 16:16, like the “sacred tent” of the Carthaginians.
The “images” were rather “pillars” (Genesis 28:18 note).
Groves - See 1 Kings 14:15, note. The “groves,” it will be observed, were “built” on high hills and “under green trees.”
Under every green tree - i. e., under all those remarkable trees which, standing singly about the land, were landmarks to their respective neighborhoods, and places of resort to travelers, who gladly rested under their shade Deuteronomy 12:2.