The example of Kosovo is not similar because of the terrible treatment including ethnic cleansing, mass murder and torture that Kosovars suffered within the former Yugoslavia and Serbia. Even if other examples are more similar, they are regrettable themselves, we should be seeking to bring nations together through means such as the EU and UN not split them apart.  The main reason for Kosovo's recognition stemmed from the fact that it was never really simply part of Serbia. Until the illegal constitutional changes made by Milosevic in 1989, Kosovo was a part of the Yugoslav federation in its own right, with its own seat on the Yugoslav presidency. One can't possibly claim the same constitutional status for RS, which is quite simply the areas of Bosnia which the Bosnian Serb forces were able to ethnically cleanse and keep after the war ended in 1995. Unlike Kosovo, the RS has no historical, legal or constitutional precident and is to a large degree the product of ethnic cleansing.