Also now for the referendum, the central government sent four thousand police officers in cruise ships to the port of Barcelona to prevent voting. Does not seem particularly grown up to me neither ...
Then I think about the secession desire of some in California. (I'm on the west coast of US). Personally I don't care. It doesn't really make historical sense, but whatever. Of course the talk is of the whole west coast seceding, and I live in Oregon. I don't want to secede, so that I have a problem with.
I suspect the main issue is money, but the secondary issue would be fear of a slippery slope of secession.
And that's before we start thinking about agriculture. Of course, in that scenario, water becomes interesting.