Yup. Corsica attempted to secede from France. Paris declared the small island as old drug mafia rebels ... and used maximum force. Nobody talked about human rights even in EU yet there were commandoes everywhere on street corners. But the bloodiest secession attempt was Quebec from Canada - 000's dead.
None of the big powers will entertain secession anywhere to avoid their own problems.
China has Taiwan & Tibet
EU has Catalonia, Scotland, etc
Canada has Quebec, Nova Scotia
Russia has Chechnya & all those autonomous republics & okrugs
Even the Turks have their Kurds... and then look at the newly "independent" African states - S.Sudan & Eritrea - shida tupu.
It's the absolute worst time - internationally - to talk secession
only a fool think secession is a walk in the park.