(Note: This post is predicated on the notion that secular commentary from theists, such as on sociology and psychology, is permitted. If it is not, I apologize, and will request this post be deleted)
This is a rather interesting subject for me. I have long noticed, in both a religious and secular context, that most self proclaimed “rationalists” and “freethinkers” both tend to have high homogeneity of opinion (most of them are followers of the AGW cult) as well as, relative to the general public, higher levels of statism and managerial mentalities. They are more likely to regard government as a benevolent managerial entity which is foolishly distrusted only by mad, Bible-thumping Glenn Beck watchers. This is particularily true in the area of education, where many “statheists” are fervently opposed to letting parents, rather than government “experts” and bureaucrats, have control of their children’s learning, on the grounds that “religious nuts” will turn all their kids into miniature Fred Phelps and Jim Jones were it not for the benevolent Progressive Interventionist State and it’s powers of divine management and compulsion.
If you want an absolutely perfect illustration of this mentality, just google “RationalWiki”. Ricky James Moore II nailed it, as usual. The message boards dedicated to Richard Dawkins and the James Randi Educational Foundation are also good illustrations, as is this FSP thread.
From a psychological perspective, (and this ties into the Austrian concept of demonstrated preference), I think fewer people are atheists than is often realized. Most fanatical adherents of environmentalism are either atheists or pagans (who seem entirely confined into annoying hippies and the kind of people whose idea of a good time is listening to obscure death metal bands while reading Mein Kampf). Effectively, most people have a single object which they devote themselves to on faith. It may be religion, it may be the environment, or it may be odder, esoteric pseudo-cults like the space cult (both the one Rothbard spoke of and the nationalist kind obsessed with sending phallic rockets into space for the glory of their mother country). There are genuine atheists, but they are, as mentioned, rarer than you think. Ayn Rand, Walter Block, Penn Jiillette, these are examples which jump to mind, though Rand is borderline at times.
I’ve also noticed that the “fundamentalist atheists”, who I’m sure are just a vocal minority among a sane majority, seem to subdivide into two groups, the gender ratio of which is rivalled only by the clientele of strip clubs and comic book conventions. The first of which are the “ringleaders”, the Dawkins and Hitchens of the world. While Hitchens is much more vocally political (I don’t know Dawkins exact views, but if I had to take a guess, it’d be a social democrat, though I tend to presume that about virtually everything due to the dominance of that ideology in Western culture and media), both are certainly vocal about their views on everything else, and both are firmly convinced in them. They act as guiding “leaders”, probably without realizing, to many young people who feel an air of charisma and “no nonsense” from them. This includes, but only partially (their followers, I imagine, are chiefly in tertiary-level academia), the second group.
The second group is most likely (for reasons Plato elaborated on in the Ring of Gyges) more present in cyberspace than in the real world, but I have no doubt they are just as fervent in their positions in many cases, but too timid to put it out front, so to speak. It consists of men aged 12-30 (they are typically teenagers to very early twenties young adults, in my experience) who have a sort of smug sense of superiority and poor social skills, which causes them to congregate rather like a herd of angry elephants into internet chat rooms and message boards dedicated to discussing atheism. They seem not to be so much “atheists” or even “antitheists” as much as “anti-Christians”, given they rarely turn their wrath towards the far more visible influence of Hinduism or Islam (though they lack of criticism of the latter is easy to figure out, and in some countries, not merely Middle Eastern ones, possibly legally actionable), and will even enthusiastically defend them as part of a sort of multiculti cultural Marxist mentality. There’s not one particular “holy grail” example that stands out, but just google “atheism discussion” or “atheism forum” or “atheism chatroom” and you’ll no doubt find many.
Just my two cents, and not for the Charon ferryman, either.