Eurozone Ping.
As another poster noted, this is a straightforward matter of sovereignity. What is EU going to do about it, except exact some sort of petty punishment? Not one damned thing. If the PC bozos of the Euro-ruling elite can't get it into their heads that open borders and "multiculturalism" are simply slow-acting death warrants for a nation, then, yes, EU will fall.
If, contrarily, the assorted populations of the various EU member nations (essentially) force the pointy-heads to abandon these two idiotic propositions (the Dutch have already shit-canned the multi-culti bs), then there is no reason why EU, as a political entity, cannot survive.
Have to find some means of getting shut of their excess, uh, Amish populations though.