OHappyDay:
Yes, if the scrolls found in the caves at Qumran are those of the Essenes, they did divide the world into the "righteous" (themselves") and the "unrighteous" (all others). They considered themselves God's favored people who would survive the destruction of Jerusalem and the corrupt priesthood. Instead, they were destroyed along with other Jews by the Romans.
But this view was also held by many Christians as well. The Catholic church has only moderated its views in recent years. But it was clear that originally the Church taught that there was no salvation outside the church. They persecuted and murdered other Christians as "heretics" and "apostates." They equated their Church with God.
All this has a familiar ring to it. The Watchtower as "God's organization" feels that there is no salvation outside of its domain. They spiritually "kill" all apostates and condemn all other Christians to destruction at Armageddon. They anticipate the time when 6 billion people will be destroyed by God.