The Fellowship of the Holy Fallout

Glory be to the Bomb, and to the Holy Fallout. As it was in the beginning, is now, and ever shall be. World without end. Amen.

Courtesy of the Planet of the Apes Wiki. If you're a PotA fanatic, you will recognize this little sect of mutants (introduced to us in the 1st sequel, Beneath the Planet of the Apes.

The Fellowship of the Holy Fallout was a religious congregation of telepathic mutants who lived beneath the ruins of New York City in the latter half of the 40th century. Like their followers, the members of the Fellowship were descended from a long line of mutated humans, whose origins dated back to the late 20th century. Following an ape uprising in 1991, the human controlled governments of Earth waged war with one another – a war which devastated significant parts of the population, and caused drastic geological upheaval.

Survivors of the nuclear holocaust were forced to seek shelter in the ruins of cities contaminated with atomic radiation. The exposure to this radiation caused severe genetic defects – defects which were passed down through the generations, forcing select groups of mankind to evolve into a new subspecies of mutant. Two-thousand years later, many of these mutant descendents began to develop advanced telepathic abilities. Whether these mental endowments were borne as a side-effect of their mutation is still a matter of speculation.

By the late 40th century, a coalition of mutants established a settlement for themselves in the ruins of St. Patrick's Cathedral in New York City. They had acquired a weapon of mass destruction – a surviving relic from Humanity’s downfall. This was a Doomsday device known as the Alpha-Omega Bomb. Declaring the weapon as the "Divine Bomb", this congregation of mutants became known as the Fellowship of the Holy Fallout. In their culture, the Alpha-Omega Bomb represented not only a unifying characteristic of their lifestyle, but of their origins as well. They believed that God spoke to them through the weapon. They placed the missile, as well as its accompanying launch controls, at the nave of their altar in the cathedral.

Well, I would say not that God spoke through the bomb, but that the bomb itself was their god. Otherwise, why profess, Glory be to the Bomb...?