Given the sort of treatment the Jews got from Visigoths (thats before the Moors), if I had lived then, and saw the Moors outside the walls, I would grease the hinges big time on the city gates.

You will lose the Spanish nationality if you don't settle in Spain, according to Spanish nationality law. Also, you need to speak Spanish and pass an exam to get it. Anyway, are you sure you can get it?

Such a referendum is illegal and will never take place. Catalonia is an integral part of Spain and will always be. Anyway, separatists are not majority.