—To your first assertion, they have what would be hard not to describe as an atheist creed (expressed here in a court brief, but how secular can you get?).—
Depends on what you mean by “atheist creed.” If all you mean is that “it is a creed propagated by some atheists” then I agree. But, if, in keeping with your discussion about a broad atheist creed, it is supposed to mean a creed that has something inherently to do with atheism, then no, that’s fuzzy thinking on their part (its just a LITTLE more fuzzy than particular theists trying to claim that being against interracial marriage is part of “the” a theist creed).
AA clearly thinks the latter is what they are doing. They are DENSE.
—I took as a definition of thier identity the page—
So some people have a page. Good for them. The fact is, freethinkers were stated by groups of people that included deists.
—A person who forms opinions about religion on the basis of reason, independently of tradition, authority, or established belief. Freethinkers include atheists, agnostics and rationalists," but does not specifically exclude deists, it just repudiates religion.—
Taking just the first part, countless Christians could fit comfortably into that definition of freethinker, especially if they are radicals. So this is not the same thing as “repudiating religion.” It’s repudiating religious ideas that are accepted merely by tradition. Whatever any webpage says, the one thing I can say about freethinkers is that almost none of them agree on what a freethinker is.
— I’d submit that an atheist finds the belief in reason and the evidence perceived by the 5 senses to be the positive/affirmative similarity that binds them.—
Try explaining that to non-theistic mystics. Try explaining that to Buddhists. Rationalism is not the same thing as atheism. Not all atheists are freethinkers by the included definition of freethinkers.
—To their view, a Christian, say, belongs to the set of those negatively defined, ie, they don’t ‘believe’ in the supremacy of reason over faith.—
Some Christians DO believe in the supremacy of reason over faith! Certainly many theists do, especially in those religions that don’t put the sort of supremacy on faith that Christians do.