John Gills Exposition of the Bible Commentary - 2 Chronicles 11:15
And he ordained him priests for the high places ,.... Of such who were not of the tribe of Levi, and family of Aaron; see 1 Kings 12:31 . and for the devils ; demons in the shape of goats, as this word signifies, in which form many of the Heathen deities were worshipped; idols of whatsoever kind are so called; for whosoever worships them worships not God, but devils, 1 Corinthians 10:21 the images which Jeroboam set up may be meant, and the next clause may be rendered as explanative... read more
Matthew Henry's Complete Commentary - 2 Chronicles 11:13-23
See here, I. How Rehoboam was strengthened by the accession of the priests and Levites, and all the devout and pious Israelites, to him, even all that were true to their God and their religion. 1. Jeroboam cast them off, that is, he set up such a way of worship as he knew they could not in conscience comply with, which obliged them to withdraw from his altar, and at the same time he would not allow them to go up to Jerusalem to worship at the altar there; so that he totally cast them off from... read more