24 Then, after the destruction of all the people of Ai in the field and in the waste land where they went after them, and when all the people had been put to death without mercy, all Israel went back to Ai, and put to death all who were in it without mercy.
Matthew Henry's Commentary on Joshua 8:24
Commentary on Joshua 8:23-29
(Read Joshua 8:23-29)
God, the righteous Judge, had sentenced the Canaanites for their wickedness; the Israelites only executed his doom. None of their conduct can be drawn into an example for others. Especial reason no doubt there was for this severity to the king of Ai; it is likely he had been notoriously wicked and vile, and a blasphemer of the God of Israel.