The vent occured in the country controlled by the separatists.
They are caring for the dead as they see fit. Aside from the fact they shot down the plane, they are responsible for dealing with the dead, IDing them, sorting it all out and then dealing with the foreign families and governments.
They are not meeting their responsibilities. Their caring for the bodies as they see fit, sucks.
And that's as you say, aside from the fact that they shot down the plane.