Sorry, it's late and I'm tired of having the burden of proof. This is what I will add to the reactions to the ruling (and to the trial)
https://en.wikipedia.org/wiki/Trial_of_Catalonia_independenc... . Several international organizations having problems with the trial, not many international reactions on either side. About the UDI... it was a letdown, that was not a real one and everyone that wanted one was disappointed.
On that "both sides are guilty" I could find all the times the Catalan government has tried to talk and the Spanish response has been "no". It's hard to reach a consensus when one side is so fixed on not taking.
I haven't said, and neither think, that the Spanish police is worse than the Chinese one. But if they can make the comparison it's because the way the Spanish police is acting is quite unprofessional and unworthy of a force acting in a democratic country.
What do we want? Lots of things, because there are lots of "factions", each with different needs. I'll try to summarise the principal, some of which I may not agree with. I won't enter into wether they are real or not, some you might think they are not and I'm tired of explaining the same to different people in different media, I should make a github repo.
* Cultural freedom. Catalan culture feels the constant oppression of centralist Spanish culture trying to reduce it to folk usage, like it has almost done with Galician and Valencian (which is the Catalan spoken in Valencia).
* Our money. Catalonia gives more money than it receives.
* End of corruption. We are tired of the rampant corruption in Spain. And yes, Catalan corrupts should go to jail too, starting with Pujol.
* A future. The young ones don't have a future. There is no money, there are no jobs, the world is being destroyed.
* Improve public services. They are being destroyed, in the name of profit (for friends of the different ruling parties).
These are different things that different people want, there are probably more (like letting the political prisoners out and remove the occupation forces). Some are right wing, some left wing, and most of them would sit well with Spanish people.
This is not Catalonia against Spain, it's not even left vs right, it's up vs down.