Part of my family is Galician, I'm Portuguese myself. Still, instead of breaking Spain apart I would actually prefer to see the whole of Iberia working together as a union.
The main problem seems to be where the capital would be placed since only Castilians would want Madrid. I only wish that we could agree on a small but memorable place like Santiago de Compostela as centre for that union.
Fragmented even more, our Iberia has little voting power in regards to negotiating with France and Germany in the European Union. If Catalunya has to separate, so let it be. In the end of the day we are all together on the same boat, can only wish that we could row together too.