Along with Muslims, Srbs and Croats are historically constitutive here, there's no such thing as simply "Bosnians". so these two ethnicities have been her for centuries here as well as in Serbia and Croatia. The difference is the other two are independent countries. Serbs are the biggest disruptive factor because they have a separate entity within our country and don't really hide the fact they want to secede. The problem is only Russia and Serbia would acknowledge that. The Dayton Peace Treaty cemented the current status quo without the possibility of a serious improvement unless you're willing to risk turning back the political clock to 1945.