It looks like here you have inadvertently provided a good argument for the opposite of what you wanted.
That's odd, it looks to me as if you're taking a rather loose analogy in a direction somewhere away from the topic. Getting back on topic:
My point was that "conservatism" isn't a thing — it's a label, and that people's responses to that label have to do with what they take it as referring to.
It's been noted elsethread that the survey has serious problems. One of them is that it doesn't ask what the surveyed psychologists think they are talking about when they say "conservative". If you ask someone, "What do you think about conservatives?" you will get different answers based not only on what that person's values are, but what they think "conservative" means.
If scientists use "conservative" to mean "a person who values religious doctrine over scientific results", then you are ill-advised to represent yourself as "conservative" when trying to get a job from a scientist. Especially if you don't mean that when you say "conservative"!
Note the difference between "scientists use 'conservative' to mean 'a person who values religious doctrine over science'" and "scientists think that conservatives value religious doctrine over science". The latter implies that scientists are referring to an objective class of "conservatives" whereas the former considers that scientists may not be referring to the same set of people when they say "conservative" that someone else refers to by that word.
I think we have a problem of sneaking in connotations here.
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.