Because he was angry. All the Israelites gathered and fought the benjamintes, and destroyed the city, and killed ask the women. They also promised never to let their daughters marry a benaminite.
However, then some smart people realized they actually needed all 12 tribes so that encouraged the remaining benaminites to kidnap some women to marry. This saved them from extinction but it the tribe always stayed small.
theXpanther t1_j05khdt wrote
Reply to comment by WordsMort47 in A priest and a nun in a desert cabin by boa_constrictor
Because he was angry. All the Israelites gathered and fought the benjamintes, and destroyed the city, and killed ask the women. They also promised never to let their daughters marry a benaminite.
However, then some smart people realized they actually needed all 12 tribes so that encouraged the remaining benaminites to kidnap some women to marry. This saved them from extinction but it the tribe always stayed small.