He had done good in Israel, i.e. in Judah, which was an eminent part of Israel, and the only part of it which owned God, or was owned by God as his Israel, to whom therefore he oft appropriates this name, thereby signifying that the other tribes were unworthy of that honourable title, and had forfeited all their right in it to Judah. See Poole on "2 Chronicles 21:2".
Related Commentaries of 2 Chronicles 24:16
2 Chronicles 24:16
16 And they buried him in the city of David among the kings, because he had done good in Israel, both toward God, and toward his house.