Pretty much any RW article I've ever seen takes the premise that the position of the mainstream academia -- and, in case of more explicitly politicized topics, the left-center of the respectable public opinion -- is correct, and any serious contrarian position can be held only by comically nutty crackpots or sinisterly malevolent extremists. Now, this isn't always a bad heuristic: it produces more or less correct conclusions on topics where the aforementioned institutions are usually reliable, such as, say, physics. But on any topic where they are significantly biased, RW ends up as a passionate defender of all their biases and falsities. And from what I've seen, the RW writers typically make no serious effort to study such topics dispassionately, but instead jump at the first opportunity to engage in ideological warfare, typically via ignorant sneering and mocking.
As an example, you can take pretty much any topic that's matter of significant ideological controversy -- economics, history, human differences, political theory, let alone everyday politics. Out of several dozen RW articles I've read, I don't think I've seen a single one that looks like a fair attempt to make sense of the topic at hand.
Of course, you may believe that the intellectual institutions whose output inspires the RW writers are in fact reliably correct about everything. But even then, it would be clear that the latter are mostly just parroting the former without much real understanding and motivated mainly by the thrill of ideological warfare.
I suspect the effect you're seeing is relative to a US-based libertarian viewpoint, and comes from many of the contributors not being in that category. So it might well look that way relative to LessWrong community norms. Describing it as a "heavily ideological website" when it's nothing of the sort is not how I would steel-man your argument, and may not serve your advocacy of said argument optimally.
What are the best example articles of what you're talking about, and what's wrong with their positions? (If possible, pick something bronze or bette...
I am not sure whether this has been posted here before but I came across this: http://rationalwiki.org/wiki/LessWrong
What do you think about RationalWiki in general, and their opinion regarding LW?