Separatist movements play on hurt
A case in point is the various separatist movements in the European Union. Scotland will be holding a vote on independence from Britain in 2014, and both Catalonia and the Basque country in Spain have just elected nationalist governments that promise to hold referendums on independence. But it will probably never happen.
The Scots, the Catalans and the Basques tend to see themselves as victims, but nobody else does. They are self-governing in most matters except defence and foreign affairs, they have their own budgets, and they maintain separate education systems and cultural institutions.