Gideon’s son Abimelech wanted to be king of Israel. Following the example of the kings of the nations, and aided and abetted by his kindred in Shechem, he murdered seventy of his half-brothers to consolidate his throne. Unfortunately for Abimelech, his father’s youngest son escaped his hand and lived to curse him in God’s name. God heard and answered Jotham’s “attack prayer” because he offered it in accordance with the Lord’s mind and will, in hope of seeing divine justice done on behalf of his brothers and his father’s family.
Not all curses land on their target. This one did, and the writer of Judges makes sure we understand what was happening behind the scenes in the spiritual realm.