Philosophers from Catalonia are circulating a petition to plead for de-escalation of the current conflict. As this newspaper article reports, and as was confirmed to me by one of the original signatories, the group who took this initiative includes people in favour as well as against independence for Catalonia (and, presumable, some who think “it’s complicated” and have no firm views).
You are all invited to sign in order to call upon both the Spanish and the Catalan politicians to de-escalate and put in place a proper process through with all parties can peacefully engage with these questions, and hence replace confrontation and violence with a proper dialogue.