Legally, yes. The facts on the ground are that the UN is in charge.
Krajina was Serbian land.
Krajina was both Serbian and Croatian land. Then Croatia stole it by force.
And several of this "free people [...] in charge in Serbia" are EU/NATO puppets
Are you saying that Kostunica, elected PM of Serbia in a free and fair election, is a "puppet" simply because he wants Serbia to move forward and reestablish normal relations with the West?
Have your blue pill or you wake up :)
Why don't you wake up and realize that the dictator is dead and that the Serbs are free to rebuild and make their own destiny.
Kostunica is maybe not, but he cannot do much. The elections in Serbia are not really "free and fair" because there is too much pressure and intimidation from the West.
They are not free now. They are under the EU/NATO boot in many subtle or not so subtle ways. The destiny for them is being made in Brussels and Washington as it was made in Istanbul in the past.