I don’t buy any of it.
Show me a peer-reviewed paper that comes to a conclusion that makes the author’s own views look morally suspect, and I might take it more seriously. There have been plenty of papers written to ‘explain’ the difference between conservatives and liberals - they generally take the form of subtly disparaging conservatives and casting liberals in the best light possible. Wasn’t there another recent paper which ‘showed’ that conservatives are motivated by fear?
As for liberals tolerating more change, I have two words for you: Precautionary Principle. Wholly embraced by liberals with an environmentalist ethic, the Precautionary Principle is the ultimate in ‘conservative’ outlook with respect to the environment.
And the degree in which liberals question authority and conservatives don’t is directly correlated to how much authority either side has at any given time. I’d say the Tea Party people are doing plenty of authority questioning right now, and the liberals have become the defenders of the established order.
The ‘neo-cons’ are certaintly not about maintaining the status quo - they’re trying to change the world.
Ronald Reagan and Newt Gingrich wanted to dismantle large portions of the established power base.
Conservative home-schoolers are certainly not happy with the status quo, while liberals fight to the death to maintain entrenched monopolies of the public labor unions.
As for in-groups and out-groups, there are a lot of ‘community oriented’ liberals. It takes a village, don’t you know. Protectionism also seems to be stronger among ‘liberals’, and protectionism is a pretty tribal policy - protecting your own against the ‘outsiders’.
What it comes down to is that neither conservatism or liberalism as they exist today are coherent philosophies. They’re more a reflection of the political coalitions and special interests that taken sides in a long, partisan battle. Liberals claim to be for the little guy - except when they’re supporting public labor unions that make far more money and have far better benefits than the average. Conservatives are all about keeping power in small communities - until it comes to drug wars and gay marriage. Liberals are all for change - unless it’s change away from the power vested in the special interests they like. Conservatives are all about maintaining the status quo - unless the status quo includes the media and allowing people to have abortions.
As for purity/sanctity, you’ll never meet someone as sanctimonious as a fur-hating, vegan liberal who rides a bicycle to work and wears hemp clothing, unless it’s a pious Christian conservative who thinks he’s going to heaven and all the sinners are going to hell.
This is not to disparage liberalism or conservatism. It’s to disparage the notion that you can break down the political beliefs of hundreds of millions of people into a handful of shared traits.