The atheist community is not that homogenized. We have our diplomats and our firebrands; we have our quiet atheists you'd never expect (google The Clergy Project) and our loudmouths. We also have our well-spoken advocates. We even have our own celebrities! lol
When I think of an atheist, I simply think of someone who doesn't believe. If they then form communities with diplomats and advocates, haven't they then taken it to the point of being a belief, perhaps it's own religion.
"Things should be made as simple as possible, but not one bit simpler." ~ Albert Einstein