The CCA or the "Church of the children of atom" Is a religion of peace.
I just want to make sure people understand that. The Children of Atom believe that each atomic mass contains within it an entire universe, and when an atomic mass is split many universes are created. Therefore, instead of seeing the Great War as destructive, the Church believes it was a creative and unifying holy event. The Children of Atom also see death more as a celebration of life and unification to Atom through "the Glow." "The Glow" is the earthly embodiment of Atom and the Children of Atom's direct connection to Atom.
The CCA in the Capital wasteland are peaceful. In fact without them the thriving city of Megaton wouldn't exist.
The Children of Atom residing in the Commonwealth are far more fanatical, with most opting to attack most non-members on sight. So please don't judge the CCA solely by the extremist that are located in the commonwealth.
Thank you for your time.