A vicious feud between a pair of Chassidic “Tzaddikim” and their followers once destroyed Judaism in a certain city, irreparably dividing families and institutions.
The local rabbi commented that this event explained Avraham’s prayer in Parshas Vayera to spare Sedom if there were but ten Tzaddikim present.
Ten such “Tzaddikim”, and the city will destroy itself, no Divine intervention necessary…