Divrey Hayamim Bais 21:11

11 Moreover he built high places [unlawful altars] in the mountains of Yehudah and caused the inhabitants of Yerushalayim to commit fornication, and led Yehudah astray.

Divrey Hayamim Bais 21:11 Meaning and Commentary

2 Chronicles 21:11

Moreover, he made high places in the mountains of Judah
Temples and altars for idols, which, being built on mountains, had the name of high places; and these Jehoram made or rebuilt were those which had been pulled down by Asa and Jehoshaphat: and caused the inhabitants of Jerusalem to commit fornication;
that is, idolatry, drawing them by his own example to worship Baal, for he did what Ahab and his family did, ( 2 Chronicles 21:6 ) , and compelled Judah thereto; the inhabitants of Jerusalem falling into the same idolatrous practice with him, he forced the inhabitants of the cities, and in the country, to do the same, who it seems were not so willing and ready to comply therewith.

Divrey Hayamim Bais 21:11 In-Context

9 Then Yehoram went forth with his sarim (princes), and all his chariots with him, and he rose up by lailah, and struck down Edom which had surrounded him, and the commanders of the chariots.

10 So the Edomites rebelled from under the yad Yehudah unto this day. At the same time also did Livnah rebel from under his yad, because he had forsaken Hashem Elohei Avotav.

11 Moreover he built high places [unlawful altars] in the mountains of Yehudah and caused the inhabitants of Yerushalayim to commit fornication, and led Yehudah astray.

12 And there came a miktav (letter) to him from Eliyahu HaNavi, saying, Thus saith Hashem Elohei Dovid Avicha, Because thou hast not walked in the darkhei Yehoshaphat Avicha, nor in the darkhei Asa Melech Yehudah,

13 But hast walked in the derech of the melachim of Yisroel, and hast made Yehudah and the inhabitants of Yerushalayim to go awhoring, like the whoredoms of the Bais Ach’av, and also hast murdered thy achim of Bais Avicha, which were better than thee;