> Jonathan Haidt has shown in his work on ideological bias is that liberals are unable to accurately understand the conservative worldview
Actually (without getting into methodological issues and whether he has actually shown anything), the conclusion would be more accurately stated as that liberal are unable to accurately predict the manner in which conservatives would prefer to express their worldview, whereas the reverse is not true.
I think that, to the extent this is accurate at all (and this type of research on broadly characterizing liberals and conservatives, from either side, is fraught with opportunities -- often realized -- to take broad fuzzy terms and operationalize them in ways which reinforces researchers' own ideological biases), what it really reflects is the fact that liberals in-group language is the same as the common language of the broader society and, particularly, entertainment media (to which, then, moderates and conservatives are still heavily exposed), whereas conservatives in-group language is something to which liberals are far less exposed (mainly propagated through conservative churches and similar institutions).
(This is also feeds -- though its not the sole source of -- the liberal view of conservative dishonesty, in that the main context in which liberals encounter conservative in-group language is in conservative advocacy of public policy positions, where the language used to articulate conservative values is used in a way which clashes with liberals expected use of language, and seems dishonest when it comes to values.)