Some people think it's the best. At the moment the strongest proponents of this line of thought sit in the Kreml. It's just a question of who it's best for. And they don't care if you want it or not.
The Republika Srpska cultivates close ties to their Russian brother, nurtures strong ethnic/nationalist ambitions and is a possible attack vector for Russian PsyOps to stirr things up. Don't you think a possible Civil War or some such in the Federation of Bosnia and Herzegovina would come in handy? For Russia and the Republika Srpska?
Oh, and please don't shoot the messenger, I'm just looking for an exit.
By, the way that Balkan thing is much older. In 1888 Bismarck is quoted as saying "One day the great European War will come out of some damned foolish thing in the Balkans."
He was right.