Still against more balkanization. They can have some regional stuff in the EU superstate, but they cannot just leave their nation state until it is absorbed/replaced/turned into a larger province by the EU. Even if the Spanish government made a mistake in beating people, that does not give Catalonia the right to secede.
It might be helpful if the EU were to negotiate, as a neutral player, in order to find a way for them to be friends again without Catalonia getting to be greedy about its money. Wealth concentration is nothing to be proud of, it merely means you raised the cost of living to the point all poor people had to move out. To then say you want to secede because you don't want to pay for the poorer regions is just greedy and injust.
The whole "but they're killing our culture!" is quite funny
when you have at least 23 Mc Donald's in your city...