Now the men of Israel had sworn in Mizpah, saying, There shall not any of us give his daughter to Benjamin as wife.
"O Jehovah, why has this come to pass?"   (Judges 21:3).  Why?  They had gone far beyond the Word of God.  God indeed had commanded that the offenders of Gibeah should be destroyed, but there was no Divine order to destroy one of the tribes of Israel.  Their rash oaths full of sin and bitterness were the source of the calamity, not God.