I actually think it does follow. Understanding what people of different races experience is, apparently, a major cognitive blind spot. For instance, lots of people think that racism was a problem forty years ago, but isn't a problem today. But what did people forty years ago think?
Sure,we've probably made progress since then. But if there is still widespread discrimination, would you notice? If you read the recent post from gwern on the psychology of power, you'll notice that this is just another application of a common set of biases.
There is, of course, also the issue of women; someone else brought up Larry Summers. Having women involved makes teams more effective -- that's instrumental rationality right there. And, of course, we have a fair number of philosophical debates here. It's well known that women have different philosophical intuitions than men. I would not be at all surprised to learn that the same is true of people of color. As Jef Raskin notes (in a completely different context), intuitive means familiar. Having had a different set of experiences would, of course, change what is familiar. To the extent that our debates rely on intuition, perhaps without our even noticing it, it's extremely valuable to get a different perspective.
When you link to people like VDARE, you are sending a very strong signal that you would really rather not have people of color here. Nobody likes to be part of a community where their ethnicity or gender is a reason to dismiss them as just not that smart. And this is an especially rough burden on people who are more likely to dissent from the local consensus by reason of their differing intuitions and experiences.
If you really, instrumentally, care about having people of color read Less Wrong, and you really care about coming to the correct conclusions, you ought to do what you can to make this a less unpleasant space to be around. Otherwise, you'll be excluding a bunch of interesting people and missing a bunch of useful data, and you'll never even notice.
I will consider your post.
Summary: Current social psychology research is probably on average compromised by political bias leftward. Conservative researchers are likely discriminated against in at least this field. More importantly papers and research that does not fit a liberal perspective faces greater barriers and burdens.
An article in the online publication inside higher ed on a survey on anti-conservative bias among social psychologists.
The link above is worth following. The problems that arise remind me of the situation with academic and our own ethics in light of this paper.
I can't help but think that self-assessments are probably too generous. For predictive power of how an individual behaves when the behaviour in question is undesirable, I'm more likely to take their estimate of how "colleagues" behave than their estimate of how they personally do.
This shouldn't be surprising to hear since to quote CharlieSheen: "we even have LW posters who have in academia personally experienced discrimination and harassment because of their right wing politics."
While I can see Lammers' point that this as disturbing from a fairness perspective to people grinding their way through academia and should serve as warning for right wing LessWrong readers working through the system, I find the issue of how this our heavy reliance on academia for our map of reality might lead to us inheriting such distortions of the map of reality much more concerning. Overall in light of this if a widely accepted conclusion from social psychology favours a "right wing" perspective it is more likely to be correct than if no such biases against such perspectives existed. Conclusions that favour "left wing" perspective are also somewhat less likely to be true than if no such biases existed. We should update accordingly.
I also think there are reasons to think we may have similar problems on this site.