They don't carry flags saying "Baptist" or "Methodist", they simply converse.
No, but they work for organizations with names like "Lutheran World Relief" or "Baptist Global Response," and their logos invariably feature crosses or other religious insignia. And not only that, but they network together, so that all the Lutheran and Methodist and Baptist relief efforts are communicating and working together, but they don't extend nearly the same effort when interacting with secular groups, which leads to a lot of obviously Christian evangelical groups spending most of their time together. They don't make comparable efforts when working with secular groups, and will often work completely autonomously from them, sometimes with disastrous results.
The Emperor knows this firsthand, as an atheist who has helped coordinate fundraising and other efforts for Lutheran World Relief.
And from what I've seen, athiests (and especially antitheists) continually shout "there is no god!" from the rooftops.
Of course, the only atheists you "know" are the vocal ones - that's because you'd never, ever recognize a "stealth" atheist. Get off the Internet, try to meet some real atheists (you will probably fail, due to the nature of atheism), and stop spreading derogatory lies about entire groups of people. The vast majority of atheists and agnostics will not openly bring up their beliefs, perhaps not even if pressed on the subject, because non-believers are the most persecuted and unpopular group in America, largely because of the intentional ignorance spread by people like yourself and your pastor. THIS IS ESPECIALLY TRUE IN HIGHLY RELIGIOUS DEVELOPING COUNTRIES, WHERE ATHEISM IS EVEN LESS TOLERATED THAN IT IS HERE. Openly identifying as an atheist is not only extremely improbable behavior for an atheist in any situation, but in a country that does not have a strong tradition of liberalism, it is actually dangerous.
(We have not decided to correct you because you have offended our fellow atheists; The Emperor defends the truth and integrity of all cultural groups, including religious groups whose faith we do not share. But we will not abide libels.)
He's no idiot, not by a long shot.
That is slimly possible, but "idiot" was the polite term for someone who spreads ignorance and libel about an entire group of people. "Bigot," "monster," and "evil" may have been more appropriate, although just "ignorant" probably suffices.
