Doesn't follow logically. If the only attribute of religion was believing in something that can't be known, it might be accurate, but that's hardly the only attribute to religion. However, it's the only metric by which you're judging atheism.
Who is judging atheism? If the shoe fits, wear it. From http://dictionary.reference.com/browse/religion?s=t:
[ri-lij-uh n]
...
something one believes in and follows devotedly; a point or matter of ethics or conscience:
...
What else might atheism be, other than philosophy, since God hasn't been disproved, and there are multitudes who believe strongly that God exists?
Let's look at the most relevant definition of religion, because you took the sixth most relevant definition and tried to use it to prove your point:
Definition 1: a set of beliefs concerning the cause, nature, and purpose of the universe, especially when considered as the creation of a superhuman agency or agencies, usually involving devotional and ritual observances, and often containing a moral code governing the conduct of human affairs.
Atheism has one belief: there is no god. It is not a set of beliefs on the cause, nature, or purpose of the universe. It does not subscribe to belief in superhuman agency, ritual observances, or a moral code by which to govern the conduct of human affairs. Definition 1 fails entirely.
As for the rest of the definitions, there are no moral codes, rituals, or a defining theory of beliefs that originate from atheism, because atheism is only the belief in the nonexistence of god. That's the beginning and the end of atheism. To the extent there are patterns you recognize from atheists, it is from something that might more closely resemble a "religion" (like secular humanism), but in all relevant applications of the the word religion, atheism doesn't fit. There is no underlying moral code with atheism. The moral compass comes from other schools of thought, like Natural Rights Philosophy or Secular Humanism, not from atheism. The confluence of these schools of thought with atheism are complimentary, but coincidental.
I would agree that ambiguous definitions are not the best. But that is what we have. If one doesn't like the definitions of his particular religion, perhaps he should change the name of it to something that is less ambiguous. For example. Tis not "atheism," but rather tis "atheism - a set of beliefs concerning the cause, nature, and purpose of the universe, especially when considered as the creation of a superhuman agency or agencies, usually involving devotional and ritual observances, and often containing a moral code governing the conduct of human affairs." However, rather a long "word," right?
There's no need to change the word. Atheism means something very specific: belief in the nonexistence of god. There are no other attributes to atheism. That's why it's not a religion. Because atheism is not associated with anything else you said. Atheism is NOT a set of beliefs concerning the cause, nature and purpose of the universe. Atheism is NOT a set of beliefs about the creation of superhuman agency. Atheism does NOT involve devotional or ritual observances. Atheism does NOT contain a moral governing code. All those things that apply to religion do NOT apply to atheism.
Atheism is the belief in the nonexistence of god. FULL STOP.
That's precisely why atheism is a religion. There is no proof that God does not exist. There is ample evidence that could be attributed to the existence of God. Atheism as a belief is just that, a belief. It is not fact. And it is not very close to fact. Yet there are many people who hold to their belief in atheism very strongly. It is a bare-bones religion
At best, atheism is a philosophy.
Atheism is a belief, nothing more. It lacks every attribute of religion except for a belief in something. You're focusing on the one thing it has to the exclusion of all the things it doesn't. It's still not a religion, the same way that trigonometry is not a religion. Trigonometry has a lot more in common with religion than atheism does (such as rules for orienting knowledge, belief in irrefutable truths and concepts, etc.), but it's not a religion either.
If a person had never heard of trigonometry, then picked up a book that briefly talked about trig, he might be a believer in a religious sense, because he saw how trig could exist, yet had very little personal experience with it After the person learned trig and used it, he wouldn't have to be a believer, because then he knew about trig.
Any strong atheist who is a believer without knowing that atheism is full of holes regarding its truth, is really religious in his belief. If he knew about the holes, he might come away from strong belief in atheism, and atheism might become a philosophy to him.
You're conflating "beliefs" and "religion." Religion is built around beliefs. Beliefs are not religions. Your understanding of religion would necessitate the acceptance that every individual belief in the world is a separate religion. People who believe aliens crashed in Area 51: religion. People who believe in chemtrails: religion. People who believe Obama is a Muslim: religion. People who believe the fluoridation of water is a conspiracy to control the populace: religion.
None of these things are religions because beliefs are not religions.
Wrong. They are not religion when they don't fit the dictionary definitions of the word "religion." When they do, they are.
There is no difference between the belief in the nonexistence of god and the belief in any of the things I just listed. They're all just beliefs. Since none of them fit the dictionary definition, none of them are religions.
Somebody who knows about Islam or Christianity, and from these believes that God exists, but doesn't follow any of the formal religions devotedly, but rather, simply says that he believes in God, and then goes on with his daily life without considering the finer aspects of either religion, he probably is not a religious person regarding these religions.
It has to do with the extent or devotion.
Some folks in this forum adamantly proclaim that they are atheists and that Christians or Muslims are nut jobs. These people seem pretty devoted to atheism. Perhaps it is a religion for them while not for others.
I would agree with this, but the distinction is that you're assigning the label of religion to their behavior, not their belief. There are no prescribed behaviors associated with atheism, only the one belief, so to the extent any atheist displays any patterns you associate with a religious fervency, it is coincidental to their belief, not caused by it, because being atheist doesn't necessitate any behaviors with regards to any religion or its adherents.
Are you calling the activists who claim they are atheists trolls?
No, my post addresses your misconceptions exclusively. How did you possibly misconstrue what I wrote to be something it has absolutely nothing to do with?
Never mind, that's what the last 20 posts have been...