I see nothing against a religion called the "Church of Humanity". The Manifest Path, which I recently founded in PeL, I even briefly considered naming that for good reason. Leaving aside the Tyr-ist sect (oh the joys of religious politics and sacrificing doctrine for power) the Path holds that everything other than humans is pretty much evil and needs to be eradicated and that human civilization needs to be spread to the rest of Dwilight.
Certainly, a religion with no explicit theology or beliefs would be non-SMA, but that's a different story from slamming a religion simply because it is called the Church of Humanity.
Poll