which was true

No this is a Russian canard and not true. In fact some of the fiercest resistance to Russian occupation came from the Donbas.

And yet, it's not a justification for what was done there, and it's not a justification for what was done in this case either. Wasn't a justification in Iraq with Saddam for that matter. I remember the day the Iraqis pulled that statue down, they seemed very happy to be able to do that. And then...

My understanding is that the US military is not so great at the "hearts and minds" game, to put it politely. It doesn't take much time for locals to be outraged by macho assholes acting like they own the place. Makes the recently dethroned dictator look somewhat decent in comparison.