I'm not sure I agree entirely. At a minimum, this is not clear within the belief structure of SA.
Not surprising. SA is so intentionally vague and imprecise, that you can interpret it many different ways.
Still, it contains several things that I feel are required to call yourself a religion:
* A belief in a specific set of supernatural forces/beings. These do not have to be personified "gods". They could be forces that are simply beyond the comprehension of mere mortals.
* A veneration and/or worship of these forces.
* A desire to spread the veneration/worship/influence of these forces.
If you don't have these things, then, IMHO, you're not a religion.
That does not mean you're an atheist, or that you don't believe in a god/gods. It just means that you're not an organized religion,
within the context of BattleMaster.
But as I said, that's just my opinion. YMMV.