How do you define religion?
Far as I know, any attempts to reach a consensus definition end up muddying any understanding. So I have for years now accepted that useful definitions of religion are unavoidably reliant on specific, even personal parameters.
In my case, I don't recognize as actual religions doctrines and belief systems that rely on dogma as opposed to reflection, insight and personal development.
Therefore, many otherwise succesful systems that claim to be religions are not even related to religion proper far as I am concerned. Several of those that fail to make the grade are in fact doctrines that make a point of establishing a severe system of strife and mistrust, usually with outsiders, often enough among insiders. Others are based on fear of mortality, obsession with spirits or with deities, or even garden variety cults of personality.
Social psychology working as it does, that unfortunately often brings a superficial appearance of "solidity". It takes a measure of attention and information to realize how poisonous and destructive they are.
To put it in other words: once back in the day I used to be willing to presume a certain form of validity in movements that claimed to be religions. I have come to realize that it is a dangerous concession to make, as well as a source of endless confusion. Validity is not to be presumed without evidence.
I am all for establishing parameters for what should be acknowledged as a religion. But I am well aware of how difficult it is to reach consensus on that regard.