The discussions on SSC were often intellectual and rationality-based, but a lot of the super-commenters were right-leaning. Left-leaning commenters were more scarce, and even benefitted from some affirmative-action less-strict moderation to encourage them to sick around. In fact, after the recent BLM protests, a new user showed up to argue and explain the social justice position, and did so respectfully and was well-received.
But I think a lot of the regulars had their blind spots. So many arguments were essentially: since A is true, B and C are the logical conclusions, but often nobody questioned A, let alone tested it—the rationality was often superficial. A popular format on the open threads (thus I’m characterizing the blog readers and commentariat, not the blog author) was impossible hypotheticals leading to un-provable speculation. Questions like what would’ve happened if Germany in WW2 had such-or-such a weapon. The format was even codified in the format of friendly aliens offering some weird bargain (take a pill to sleep 12hrs a day—or never need sleep but always be tired), then asking people what they would do or how that would change things. Fun thought problems, but so disconnected from reality or practical thought—essentially nerd-sniping (to use an admittedly uncharitable term).
Tl;DR: SSC was a mixed bag, but mostly civil and well-intentioned.
Here is the comment on archive.org:
https://web.archive.org/web/20200622224636/https://slatestar...
The fact that Trump is what you think passes for an ethno-nationalist these days is all the evidence needed to demonstrate my point.
>“Europeans did Africans a favor by bringing them to America as slaves”
This is a pretty gross thing to say, but it's not ethno-nationalism. Words have meaning for a reason.
>“Capitalist ownership of the means of production is a root of injustice and fundamentally incompatible with democracy”
The most popular politician in our country a couple years ago, and perhaps still today, is the open socialist Bernie Sanders.
Heh. Is that a joke?
> It looks something like political/national racial purity. Once people start spouting that, they tend to be removed from polite conversation.
Yeah, the American Right has really marginalized Donald Trump, Stephen Miller, et al.
> There is no similar outer bound on the left
Really? Which of the following statements will get you excluded from public political dialogue in the US)
“Europeans did Africans a favor by bringing them to America as slaves”
Or
“Capitalist ownership of the means of production is a root of injustice and fundamentally incompatible with democracy”
(One of these has been prominently made by prominent voices on one side of the spectrum without repercussion, while people are routinely excluded for statements for more moderate than the other. At least in the US, to the extent anything vaguely resembling your point is true, it's exactly the reverse of the split you've proposed.)