The recent referendums in Catalonia and Kurdistan, while by no means crucial developments for Russia, have resulted in a lively debate in the Russian media and the Russian public opinion. The Kremlin itself has refrained from making any strong statements, possibly indicating that there might be several schools of thought on these issues in key ministries. Let's look at these two situation from the Russian point of view.
Kurdistan:This is the comparatively simpler one of the two: there is no way Russia is going to take the risk of alienating Iran, Iraq, Syria and Turkey. Furthermore, "independent Kurdistan" is so clearly a US-Israeli project that there is no constituency in Russia supporting this concept. Or is there?
Let's not forget the for all the official smiles and declarations of mutual friendship, Erdogan is not, and will never, be trusted by the Kremlin. Furthermore, let's not forget that
Russia and Turkey fought 12 (twelve!) wars (1568-1570, 1672-1681, 1686-1700, 1710-1713, 1735-1739, 1768-1774, 1787-1791, 1806-1812, 1828-1829, 1853-1856, 1877-1878, 1914-1918). Neither should we forget the role Turkey played in supporting Takfiri terrorism in Chechnia. Or the fact that Erdogan himself bears a huge responsibility in the bloodbath in Syria. Oh and there is the issue of the Russian bomber shot down (with US assistance) over Syrian airspace. So, all in all, there is a lot in the past and the Russian will not ignore it. While it is most definitely not in the Russian national interest to fully support an independent Kurdistan anywhere (meaning not in Turkey, not in Iraq, not in Iran and not in Syria), a
Realpolitik approach would strongly suggest that the Russians have an objective interest in keeping the Kurdish issue festering just to have a potential leverage against Turkey. Is that cynical? Yes, absolutely. I am not saying that this is morally/ethically right, only that there will be those in Russia who will make that case.
Comment: Turkish PM Yildirim says Turkey is working closely with Russia amid the Idlib op: