Sure! Perhaps I should have said iron curtain instead of wall. My point was only that quite a few of these differences East/West of the border would have been

Sure! Perhaps I should have said iron curtain instead of wall. My point was only that quite a few of these differences East/West of the border would have been unsurprising long before the war. Some long long before: bits of the west were part of Charlemagne's empire. Likewise the US, where it's not so much of a stretch to map the culture war onto the English civil war.