Fromer Yougoslavia broke off, as the separate states wanted their own countries. Somewhere was peaceful (Slovenia), and very bloody, (the rest of the states).
They are much much better off by themselves right now. Things change, and if Catalonia wants their independence they should.
> La soberanía nacional reside en el pueblo español, del que emanan los poderes del Estado.
(The national sovereignty resides in the Spanish people, from which emanate the powers of the State.)
It should be modernised.
Thomas Jefferson said something along those lines. I think every generation might be a little extreme. Every other generation, certainly.
You would also want to note that many constitutions in Europe aren’t that old many were rewritten following WW2 and those which weren’t are often modified and ratified.
There is no legal difference between adding or removing parts of a constitution and voting on a new one.
You still need to approve a new constitution and ratify it. If you start from scratch it means that you either didn’t have a codified constitution or it was really shitty but those are pretty unique cases.
I really don’t see a problem of revising a constitution once every 25-50 years.
What is then exactly now the difference if you compare Spain with other countries?
It was to satisfy banks, but for the sake of your argumentation, they changed it.
For them, not being beaten by the police for speaking Catalan, was a huge step forward in terms of human rights.