A new Eurozone stress test... Denmark shuts its borders to immigration...

On 11 May, Denmark shocked the European Union (EU) by announcing it will install permanent stations along its frontiers to curb crime and illegal immigration. Control booths will be erected at crossings to Germany and Sweden and in harbors and airports.

This contravenes the spirit of the 1985 "Schengen Agreement" — a free-travel system that has removed compulsory passport controls between many internal borders in Europe. The Schengen Area currently consists of 25 states, all but 3 of which are members of the European Union; the non-EU members being Iceland, Norway and Switzerland.

The system has been under pressure recently with the EU Commission considering reintroducing national border controls in the face of a flood of North African immigrants. The agreement in Denmark was made to meet demands from the government's nationalistic ally, the Danish People's Party, and is expected to be approved by Parliament.

With the Arab Spring in which conflagrations blew up in Algeria, Libya and Egypt, Mediterranean border nations like Greece, Italy, Spain and Malta have also complained that the 27-nation EU has dumped its immigration issues and the costs of dealing with illegal immigrants on their backs.

Coupled with recent economic fissures appearing inside the EU and aversion by some states to come to the rescue of fellow members, the bailouts of Greece, Ireland and Portugal have already dealt a crushing blow to the euro. Spain's fate looks sealed too. With the Denmark butterfly now flapping its wings, this could be a harbinger of a wider European fragility.

Nationalism looks to be increasingly asserting itself on both the ecoonomic and social fronts...the liberal fabric of Europe is be about to be sorely tested...