I agree that politicians labeling themselves "conservative" or "liberal" is not really helpful, especially since the changes in policies they pursued over time do not match the changes in their labels; this is how one gets a situation where Angela Merkel, who calls herself conservative, is pursuing policies like mass immigration, which is clearly not a right wing position, and in fact more than 75% of the German population is in favor of immediately stopping mass immigration and has been for more than a year, so the great majority of the population is actually a lot more right wing than the supposed "center-right" party of A. Merkel, which reflects how Merkel is really much more left of the center than she pretends to be; this is not just about immigration, either, Merkel also instituted gay marriage, eroded Germany's sovereignty economically and militarily now as well and so on.
My original point was that I don't want "border dissolution" as the Freedom (a.k.a. Western) specific CV wonder. The reasoning I put forward was supposed to highlight that such a position has nothing to do with Western philosophical foundations but is simply a political sentiment, which can be found in other cultures as well (i.e. it is not even specific to the West). I elaborated that such sentiment is the result of personality characteristics that can actually be measured with great validity (especially Big 5 Personality Scale) and is replicable across cultures as well. When I was talking about conservatives and liberals I did not intend to make statements specific to the US only but specific to human nature; the reason why I used those terms instead of "right wing"/"left wing", for example, is because the US has a rather large and very accessible (for scientists) population and a rather nice bipartisan split, which makes it easy to study. When measuring Big 5 Personality Scale metrics one can actually predict with some reliability which party the person will vote for, though there are, of course, other factors at play as well. So you can just substitute "right wing"/"left wing" if you like since regarding the science I'm talking about they are what people will (usually) mean in the US when they talk about conservatives or liberals.
The fact that there is such a strong psychological and, since personality is partially biologically determined, biological basis for political opinion means that there is a certain bounding effect in the political landscape that does not change significantly over time spans of centuries (because evolution doesn't act that quickly and potential selective pressures are somewhat broad in this context); this means that there is a self-correcting mechanism at work, that can be observed right now with Trump's election and the rise of the New Right in Europe; part of this can be explained by the action of the
Behavioral Immune System which is active more strongly in people who lean more to the right (they are also more sensitive to disgust) and partly by the violation of so many borders in the current time (e.g. the border around sexuality, around gender, around religion, around culture, around nations and so on) which evokes a visceral reaction in many people who are already predisposed to be more sensitive to the violation of borders.
This is why your statement that ideologies are a product of culture is only partly true; they are, in my opinion, first and foremost parasites on the religious substructure of our society, given power by the moral vacuum in the 19th century after the "death of God" as proclaimed by Nietzsche in "Thus Spoke Zarathustra" and defined by the personalities of the people at the extreme ends of their respective distributions (largely Conscientiousness and Openness to Experience) and only secondarily are they influenced by culture. You can see that in the differences between national socialism and marxism: the first is predicated on the idea that there are extremely important, distinctly defined categories concerning people (nation, race, but also the individual...this is like drawing borders around these things psychologically) while the latter is predicated on the idea that those categories do not exist (no borders) and every human being is equal so that any difference in life outcome must be due to oppression (with some chance sprinkled in). Culture then defines the more detailed parameters, like who the oppressor and the oppressed is, for example.
I hope I explained a bit more clearly why I'm not talking about political definitions here but about biological and psychological differences between people, which are present across cultures and are therefore clearly not part of any specific culture. The "border dissolution" idea is clearly not some idea foundational or even specific to the West but instead the product of people who are at the extreme ends of the personality distributions.