A specially constructed destination determinator, the Magic 8-ball O'Migration shall be constructed, with a 4 sided pyramid inside it with the countries: Belgium, Lithuania, Portugal, & Switzerland. Representatives from the Albanian, Bosnian, Croat, and Serb (it's alphebetized - if you weren't complaining about the Swiss getting screwed, pipe down already) nations shall rock-scissors-paper to determine which three shall shake the 8-ball. Once country pairings are determined, intracontinental transfer shall ensue, thus separating the Balkan warring parties, and allowing them to meet new and interesting neighbors who don't as of yet have a specific reason to kill them.
You know where to find me when Nobel Peace Prize time comes around.
Then you have to rule out Belgium. Putting mayonnaise on french fries is reason to kill.