that the violence done to the seventy sons of Jerubbaal might come, and that their blood might be laid on Abimelech their brother, who killed them, and on the men of Shechem, who strengthened his hands to kill his brothers.
Gaal was evidently a Canaanite who disliked Abimelech (Judges 9:28) because he was the son of Gideon. He also opposed him because Gideon had both destroyed the altar of Baal in Ophrah and reestablished the worship of Yahweh in Israel (Judges 6:27; Judges 8:23). Gaal, whose name connects with a Hebrew word meaning "loathsome," and whose father’s name means "servant," did not want Abimelech to continue ruling over that part of Canaan. He did not want Shechem to remain under Abimelech’s control either.