So the regional Catalonian Government went full potato and declared independence. Madrid’s Central Government is gonna apply the law and strip them from their autonomous power… a dumb move that will inflame shit even more.
The smart move? Treat them like a country: Close the border and since they are not members of the EU, demand passport and visas. Cease all commerce till deals are made and that would require ambassadorship and a full diplomatic corps which they have not thought yet about having.
And demand payment in cash for goods and services till they open proper lines of credit.
That should be enough to have them back in the fold by July next year.
But the Spanish and their machismo overrode common sense… Oy!