Bullcrap. When you throw a coup, you do not inherit sovereignty over the possessions of the national government you killed off.
Everybody in that old territory has the same right to grab what they can as well. And they can ask for help from people who share their geopolitical interests.
And the reason the Kiev junta sent the Svoboda and Right Sector militias out east? To get the surly street thugs who installed them out of town ASAP. You don’t need them hanging around starting to watch what YOU are doing.
Brownshirts, early Bolsheviks, Early Chinese communists... they always want to get rid of the street movement that installed them as soon as they can.
That’s just how it is, sport.
Oh, stop it with the “coup” allegations. Yanukovych fled the country amid nationwide popular protests for the betrayal of his campaign promises and his attempt to lock Ukraine in union with Russia. The parliament then declared that he had abandoned his office. Argue that his removal was unconstitutional if you must, but it was not a coup. His successor was elected in a national election. Nothing stopped the residents of Donbas from participating, other than the military occupation by Russian surrogates, that is.
If there were problems with Yanukovych’s removal, this should have been addressed by political means, not by Russian military occupation. To pretend that the military take-over of Donbas by pro-Russian militias was some sort of democratic action is a joke.