There is no shortage of theories, but no definitive answers. It is likely that whatever agenda is behind this tale is political, but even that is not readily obvious.
The Book of Judges, which also features YHWH-sanctioned human sacrifice, takes place in the pre-monarchial era, about 1100 BCE. The opening line tells us there was no king, and suggests this may be the reason for the rampant moral depravity that underpins the activities. In this sense, we may have a pro monarchy writer or writers who are trying to make some other point about the tribe of Benjamin. The scriptural attitude toward the monarchy is ambiguous throughout this section of the Hebrew Bible.
It is notable that the tribal and geographic information for the characters is very specific, and yet not one individual is named. Why are the Benjies singled out, why does it matter that the “protagonist” is a Levite and why are the two cities of Jabesh-gilead and Gibeah selected as targets.
Another troubling topic is the degree of YHWH’s involvement in the actions of the Israelites as they nearly wipe out one of the tribes, and then try to fix it. YHWH clearly endorses the horrific warfare that results from the Israelite vengeance on the Benjaminites. He provides moral support and strategy for the effort. It is significant that the Israelite army makes its way to see YHWH at Bethel, which means “House of God.” It was about ten miles away from the battlefield.
Not for the first time one is compelled to ask why the loving deity is so fond of slaughter, in this case mass murder of his own people. Literally tens of thousands on both sides are killed over a single incident. A curious passage suggests that the Israelites conclude that they are only following the Lord’s orders and are not really to blame.
God did it, not us.
“And the people had compassion on Benjamin because the Lord had made a breach in the tribes of Israel.”
We are often told that the Bible provides a moral compass, but it’s hard to suss out exactly what the lesson might be in this shit show of a tale. The cowardice of the Levite fellow is not noted, nor is the fact that he lies to the assembled tribes at Mispah.
The misogyny is off the charts of course. The whoring concubine, the gang rape, the double kidnapping of young women with the understanding that they are property to be acquired. All of this is done with the approval if not at the direction of YHWH. Even the old man in Gilbeah offers his own daughter for their pleasure seeking, if only they will not break the rules of hospitality by sodomizing the Levite.
“Behold, here are my virgin daughter and his concubine. Let me bring them out now. Violate them and do with them what seems good to you, but against this man do not do this outrageous thing.”
Wonder where evangelicals get their patriarchal attitudes?
As a final point of interest, this tale is a creepy echo of Genesis 19, in which the people of Sodom surround a house and demand a male guest. Instead Lot offers his own daughters. That interlude concludes with the destruction of Sodom, followed by Lot mating with his daughters. How did they feel about Dad offering them to the mob?
Their feelings are not recorded.