The particular neckbeardy, fedora wearing, Sam Harris listening trend of atheism was a pretty clear reaction to the evangelical psychosis of the Bush administration.
Other geriatrics here can attest that the character of Christianity at the time was way different than it is now. These days, the fascists are more "culturally Christian" and avoid overt bible apologism. But back in the day, these people were constantly on TV spewing young earth creationism and other shit, and they were largely taken seriously. It's hard to believe now how much time was spent "debating" evolution back then. The atheist backlash at least affected discourse aesthetically for some time, making these views laughable, which deplatformed a lot of evangelicals or made them hide their power levels on TV.
Some argue that this brand of atheism justifies imperialism. It does so really only in theory. There really is no material basis for atheists in the US to justify an invasion anywhere in the world. The truth is that Christianity is still a far more powerful force for imperialism. Bush said that God told him to invade Iraq. I don't see any president saying anytime soon that the US needs to secularize a country through force.
If fundamentalist and political religiosity were defeated, then belligerent atheism would dissolve, but the reverse is not true.
Overall, it really does seem like people over emphasize this group of internet no-lifers because of the cultural cringe they manifested.
I had checked out for a couple of years by then, but I remember a couple of "rationalists " discussing it at a pub at the time. Well, avoiding discussing it.
I think of it as when internet atheism went from implicitly to explicitly anti-feminist, and every woman in the community had to define themselves as "one of the cool ones"
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I remember the Richard dawkins bus ad
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Dawkins and/or some affiliate atheist organisation paid for a bus to drive around London with the words "There is no God, so stop worrying about it".
I'm not going to look it up to verify it, it is too cringe
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The euphoric quote maker, however, brings me great joy
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Faces of atheism also
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For posterity
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How is that any more cringe than the christian billboards I drive past on my way to work? Genuinely asking.
I was involved in it and it hurts