The definition of religion is completely arbitrary and based on an artificial and dubious set of criteria.

I classify things a bit differently, for instance when a person's beliefs are based upon rigid circular logic about some infallible source of knowledge, I call that person a Dogmatist. But sometimes I use the word Inquisitor, especially if their dogma dictates anyone who is not converted to it will be posthumously tortured. Some people don't follow a strict tradition but apply a very reductionist, conceptually feasible model to esoteric concepts and ignore the complex relationship between the innerverse and outerverse et. al. This is a hard label to apply but I see them everywhere in the esoteric community. And I call them nutcases.