It appears that only Russia could prevent or end the conflict. On the territory that Russia controls they have build concentration camps to torture and murder the insufficiently loyal as they set about grinding their cities to dust their people to gore and erasing a culture and a people.

It seems like ceding any territory now would lead to further conflict soon both in Ukraine and elsewhere based on both recent history and Russias statements.

Furthermore it would abandon those in these territories to privation and mass murder same as the soviets perpetrated against them in the past.