That they may do according to all the folly that they have wrought; that we may punish them as such a wickedness deserves. In Israel: this is added as an aggravation, that they should do that in Israel, or among God's peculiar people, which was esteemed abominable even among the heathen.
Related Commentaries of Judges 20:10
Judges 20:10
10 And we will take ten men of an hundred throughout all the tribes of Israel, and an hundred of a thousand, and a thousand out of ten thousand, to fetch victual for the people, that they may do, when they come to Gibeah of Benjamin, according to all the folly that they have wrought in Israel.