What you need to understand is that the God Mecha is two beings in one. Some kind of vastly intelligent biological life form, and a mecha unlike anything we have ever seen before. The two are in perfect symbiosis, forming some kind of Supreme Being out of this union. The Brotherhood seeks to bring about that perfect state by finding, training, and practicing their ancient and archaic ways with the best pilots they find.
In doing so they hope to groom the future pilots who may achieve such a perfect union with their mechas to replicate this Supreme Being. This is their mission statement, and the reason they exist. To that end they are both a fighting Clan, and a recognized religious organization. The latter provides them with vast immunity throughout the factions.
To them it is a holy and just mission, all who oppose them in this are weak minded, and considered to be part of the ash the new galaxy will be built on. Some say this is more of a doomsday cult given military grade weapons. The Brotherhood thinks of itself as an organization believing in creation, as their key belief is that when the God Mecha comes, it will purge the universe of unbelievers through weapons that we can only now start to realize. Those who fall in the purge will be the ground work from which a new galaxy is laid.
No one knows exactly what the God Mecha will look like though there are many speculations that it is either waiting in the wings to be unveiled or has yet to be found. One camp thinks it is humanity who will build this machine, the other thinks it will be a Forerunner or older design we have yet to uncover. Both sides agree though that once it is found and the right pilot found for it, then the galaxy will tremble, the sentient mechas (Beast mechas of the Gigus, Nakshi, and Skriag race, as well as the Jadoon, Yallan, and Novum) will be brought into a mighty army, to march forth and begin the purge that the God Mecha will end.
Submitted by Pat Willis#224534