According to a friend of mine, who lived in the Ukraine for two years, the 'Russian speakers' had pretty much all the freedoms of other Ukrainians (a very large number of whom also spoke Russian anyway). The 'separatists' certainly didn't need liberating.
Okay - good to have some first hand evidence. I had a read up about the history of the Russian language in Ukraine, and got the impression that there's been a lot of migration from Russia in the last century or two, so that in some areas Russian is the main language spoken.
I also read about Minsk and Minsk II. I can see how it appears to favour Russia in terms of giving them influence over Ukrainian foreign policy, if pro-Russian groups who could veto joining NATO are represented in central government. It seems similar to the N Ireland situation where the migration of English and Scottish people led to the creation of an independent territory. The difference being linguistic instead of religious.
The point is, if the population of a region within Ukraine has become so distinct as to speak a different language, shouldn't it be allowed to become independent? That's one way in which countries come and go, after all.