The idea of reorganising our national boundaries to allow Scotland to 'manage their own affairs' sounds sort of fair until you think of doing the same thing in say the USA: along red and blue state lines. It surely wouldn't resolve most of the deeper issues, in fact it would create a kind of artificial barrier between them, so that the longer term positive effects of political contention would be dampened.
Red staters would get to keep heterosexual-only marriage, Fox News, 'Freedom' and cohabiting humans and dinosaurs, while the blue-staters could have abortion, socialised medicine, a limp-wristed foreign policy and as many Guatemalans as they can handle.
In the short term at least, it's hard to see how you would not end up with one essentially Republican-dominated nation and another contrastingly Democratic one. And suppose it was the right-thinking folk of the likes of New York and LA that decided to erect a definitive political barrier between themselves an those 'effing' rednecks in Alabama and Wyoming, would it not occur to them that they were selfishly cutting loose and thus politically condemning all the people over in Hicksville who either currently share their liberal values or might some day come around to doing so?
Back to Scotland. The differences here are twofold. Firstly, in the last decade or so the clash of values has been much less of a 50-50 thing than it has been over in the States; where each ideological block has appeared to have a roughly equal chance of grabbing the executive branch. It seems that the Scots feel about Labour now as east coast Democrats might feel if their party colleagues in the fly-over states had started denying evolution just to get into government.
Secondly, while the resentments in the USA have been stoked by all sorts of devious populists, in this respect Alex Salmond has a clear advantage in that he has been able to repackage them along slick nationalist lines.