Lol, you completely forgot about the little green men affair when Russia absolutely denied they were invading the Donbas and all was just local militias fighting for independence, right?
You've been played by Russian propaganda, and seems to be liking it.
What if Donbass took a tour of independent Ukraine and changed their mind, especially as Kiev crowds have ousted the president that they all voted for?
Granted, he wasn't any good, but he was likely the best one Ukraine will ever have, and now has no chance of it ever catching up with 2013.
I'm genuinely not sure why you think people can't change their mind. After all, they also voted "Yes" on Gorbachev's "reform and keep the USSR" referendum a year before that.