Supposing that it's done, one of the things I wander about is whether the EU and the Danes would understand that it's war and act accordingly-- i.e. would the ships stop, would the transatlantic flights stop, would US firms in Europe get told that they're now independent EU subsidiaries unconnected with their parent companies, would Americans in the EU be interned, etc.-- i.e would people react in the normal way that one does when one is at war.

Obviously they'd have to, but I'm curious about whether they'd do it on the first day, or whether they'd sort of wonder around half-understanding "is this war?"

I've gotten an impression from the Danes through this whole affair that they're not getting it and I wonder how little people understand in general, whether war is so foreign to them that they can't react appropriately.