Possibly. It seems to me that those minorities whose "kin" already have a majority in a neighboring state, or can get considerable help from outside the borders, are in a much stronger position eventually to get independence, or some sort of autonomy, than those who do not. I'll pass over the fact that we did not pay much mind to these realities when we got militarily involved in Vietnam and Iraq, and we paid a heavy price in many ways for both interventions without having a whole lot to show for it.
Back to the current case, Ukraine. As I said, here we have a conflict between two principles: democracy and the sanctity of existing borders. Which principle do you think is more important, or will ultimately triumph in this conflict? Ukraine's case is not helped by the fact that historically it's borders have shifted considerably. Nor are they helped by the fact that the West first created an nonsensical state - nonsensical from the perspective of national identity - in Yugoslavia, then proceeded to help dismantle it based the same national, religious and cultural divisions that it largely ignored when it created Yugoslavia in the first place. Indeed, during the dismantlement of Yugoslavia, linguistic, cultural, religious and national identities were important for the West, and now all of a sudden in Ukraine they are not?
The West may be able to do enormous damage to Russia's economy and stave off the reunification, or demands for autonomy, of Russians living in eastern Ukraine with their fellow Russians in the short run. But at what cost? Many European countries are already feeling the pinch in the pocketbook. The countries being economically damaged are often friends and allies of the US. Do we really want to create and nurture bad blood with our own allies in a quixotic effort to delay the inevitable? Or is this really being done - as a number of Europeans suspect - to further the business interests of a few large American energy firms and to create markets for them in eastern Europe and the Balkans?
Mr. Putin, of course, has not helped matters much by acting unilaterally and militarily to seize the Crimea and by aiding the malcontent Russians in eastern Ukraine with weapons and troops. In all this, which was/is basically illegal (if you believe in international law) - he was obviously led by Russian national security concerns. Both sides better find a way out quickly before the cost becomes much too high.