Today’s chapter begins with sad, familiar words: “The people of Israel did what was evil in the sight of the Lord.” The writer does not specify the nature of this evil immediately, though we could surely guess by now, but God shortly sends his prophet to declare it. Our narrator will also tell us that the first instruction God gave Gideon, his next appointed deliverer of Israel, was to tear down his own father’s altar to Baal, then chop down his Asherah pole and use it for firewood.
This also would be a clue.