I think they are trying to determine how the population is split by the voting.
If it's a large enough population that doesn't want to live under the Spanish rule, they shouldn't. And if there's a minority that does want to live under the Spanish rule, they still can, just move to Spain.
Now, Catalan nationalists/separatists (one half of the Catalan population) have the photo of "violent Spanish police" repressing "idealist people just voting", while the truth is that regional police has been boycotting the Court during a week, against the rule of law. This is going to get ugly, probably with regional government and regional police authorities charged with many years of jail.
(I'm still looking for how to make fit the local police not doing its job in the story of those violence... maybe there is a rational justification using facts unknown to me; like the central government only employing unstable violent people for their police forces, who have been rejected by local ones?)
Unless you consider the "work" of police is to beat the local population especially when they have their hands up.
I completely understand the narrative you gave for what happened before all that shit and agree with its factual aspects, but it does not magically provides quotes for clearly documented behaviors. People justifying violence by politics are, IMO, the most dangerous. It is inadmissible to sound like a local police force ignoring court order justify central police violence against a population.
In Catalan region the population is split in two. It is not a "revolution against the central government", but for the power inside the region.