This is the Russian mindset
https://news.yahoo.com/russias…ea-pushing-091433077.html
Russia's Medvedev floats idea of pushing back Poland's borders
This in my opinion is why Toad's attitude of isolationism is always doomed to fail. If the US/NATO wasn't already keeping Russia busy in Ukraine, then it's Poland or Estonia or Moldova or Romania and we're right in the same position. By that measure, it could have been Ossetia or Crimea that there was a forceful response to, and then we wouldn't be talking about Donbas.
For that matter, in WWII why did it take the invasion of Poland when perhaps it could have been short circuited earlier with Czechoslovakia or Sudetenland? Heck, why not re-occupation of the Rhineland? Had the "West" shown the will, things would have been much different.
So my observation is, the conflict starts when the "West" finally decides it's time. Until they decide it's time, their inaction only emboldens the dictator to make more brazen moves, and the dictator gets more powerful in the meantime, not less.