What does Judges 19:25 mean?

Once again, this story resembles what took place in Sodom during the time of Abraham and Lot (Genesis 19:2–7). Lot, too, was a non-native resident (Judges 19:16) facing down a mob that wanted to rape his male guests (Judges 19:20–23). Lot also offered women to the crowd (Judges 19:24; Genesis 19:8). In the case of Sodom, God carried out His plan to destroy the city before the night was over (Genesis 19:11, 23–25). By including this story, the writer of Judges is showing that the people of Israel had sunk to the level of those ancient cities God had destroyed for their wickedness (Deuteronomy 12:29–32).

An old man has brought travelers into his home to protect them from his neighbors. Those "worthless men"—literally "sons of wickedness" in Hebrew—have come to his door demanding the male guest be handed over to be raped. Likely fearing for his life, the old man offered his daughter and the man's concubine, instead. The mob ignores this request.

In a moment of horribly selfish desperation, the Levite man physically forces his concubine out the door, handing her over to the mob. The repulsive strategy works: the men of Gibeah violate and abuse her until dawn, sparing those hiding inside the home.