In Russia, certain cronies and clans turn against each other when interests no longer coincide. Is it possible that this happened then? I read that Bandera wanted a 'Greater Ukraine' and when Russia/Novorossiya decide to occupy territory, no one bats an eyelash. But, because these aren't neo-Soviet types, they are villains. It's a matter of perspective or point of view and those nationalists probably thought they wanted to secure their own territory. There were a lot of territorial disputes then and various nationalities/ethnicities all living in the same area.