I agree that you and I are not using the same definition for religion.
To me, you seem to be using religious organisations (unless I misunderstood you...) as "religion". I think you are correct that the original post seemed to refer to that as well. However, the thread detoured into other types of religion.
For example:
@Kenny said he had left secularism. He referred to it as a religion where God was not particularly important.
The problem with calling something like secularism a religion, when you are meaning to say you as an individual treated it
as it it were a religion, is that you are declaring that it is objectively understood as a religion, and those who agree or participate within it as a system are practicing a religion. And that is patently false.
If you or anyone means to say, they were
personally religious about their belief in something, like a fanatic for model cars calls modeling "his religion", then it needs to be stated in terms of "as if" it were a religion to
to them, subjectively speaking. To call it a religion in the proper sense is misleading and misguided. That is factually untrue. It is not considered "a religion".
Similarly, ATHIESM also has a specific belief about God : (In the religious belief of the Atheist, no God exists and no relationship is therefore to be had with a God.)
Sure it has a common belief. I'll agree with this. But that still doesn't make Atheism a religion. Americans, at least 50% of them still believe in Democracy as opposed to an authoritarian fascism, for instance. They share that common belief. But this doesn't make Democracy a religion, does it? Similarly, that specific shared belief of atheism, that God doesn't exist, doesn't automatically make that therefore a religion either.
We veered into this specific detour when someone disagreed with
@Kenny regarding secularism as a religious position (a religion).
He would be wrong to say it is a religion for others, in the objective sense of the word religion. That's why people disputed what he claimed. They were right to dispute that.
"Joining" a group is irrelevant though we hear of someone "joining the ranks" of atheism. However, a Theist need not "join" any organisation at all, yet they still have their personal religion that has a membership of one.
A personal religion, really isn't a religion in the proper sense. This is just a loose use of the word religion to describe one's own cherished or sacred beliefs, or to describe fantanatism and overly zealous beliefs one might hold.
It's using the word religion
poetically, such as "true religion is of the heart". I agree with that sentiment and would say that myself of course, but I don't call that "
a religion" when speaking with others. That would just confusing and lead to dispute.
Regarding core beliefs
If an ATHIEST believes or has faith that there is no God, this is a core belief of his personal religion.
If it's a personal religion, then that is up to the person to call it their religion. Not you calling it that for them. And it's not a "core belief" either, necessarily. By core belief, that means that there are many associated beliefs with that
religion as a system. A core belief in that context, means central to a system of beliefs.
Atheism is not a system of beliefs. If it is, then what are those? Simply saying one doesn't believe in the existence of God, is not a cornerstone belief for system of associated beliefs. It's simply a belief, or a position on the
single question regarding the existence of God.
Regarding values and morals
Though one may attempt certain specific generalizations, I think an individual's values and morals will vary widely. An Atheist may value kindness and truth or they may be mean and deceptive and combative. The same values may exist in the Theist. .
Yes, and this is my point. Apart from disbelief in the existence of God, there is no common value system, such as you see taught in Christianity, for instance. Humanism however does come closer to that as a philosophy, but Atheism is not a philosophy.
Regarding teachings of atheism
This also may vary. However, if they care to teach what they believe, they may teach that there is no God, no reward or punishment after this life, therefore one needs to obtain all attestation in this life. Our they may be selfless and self sacrificing. It is thy tree religion of the individual I am describing, not the organization an individual may belong to.
Again you make my point here. There is no central, or at least no commonly held philosophy that it teaches about the meaning and purpose of life. Non-theism can go in many directions, from nihilistic anarchists, to Buddhism (I consider Buddhism non-theistic as opposed to atheistic, as they don't declare a belief that God doesn't exist. They simply omit a creator deity in their religion is all).
Point is, there is no teaching of Atheism, because Atheism is not a philosophy or a religion. Religions and philosophies by contrast, do have teachings. That's what makes them a
system of belief. Atheism is not a system of belief, therefore it is not a religion or a philosophy.
Windwalker said : "There are things that make these different religions, no?"
Yes, I agree with this point. There are many different principles and things people believe in and are devoted to.
But that doesn't make them recognized as religions. You won't find Bob's love of fly-fishing, under a list of world religions.