First time I hear about this guy, he is a nobody. Idea is nonsense as well.
Serbian Zhirinovsky would be Voyislav Seselj (for future reference).
As for Kosovo best course of action is to keep buying guns and wait for them to slip up. They are slipping already, economy is non-existent, birthrate cratered without subsidies (another commie fuckup from the "good old days"), emigration is huge and they are screwing up diplomacy left and right (turns out drug runners and jihadists make for bad politicians and diplomats, who knew)
It will take a while but at some point things will fall into place.
I don't think it's possible to get the whole thing back (wouldn't want it back whole anyway if it comes with obligation to feed 1 million jihadists again) but decent chunk is doable, maybe even without shooting.
The big objective is to get the Republic of Srpska back afterwards (precedent will be important), that's where the good stuff is.
Advice: ignore Serbian media, those are bunch of parasite sellouts, especially online "nationalists"