"maybe it isn't surprising that hey hate each other"

Where did you get that from? Romanians don't hate anyone south of Danube (i.e. the rest of the Balkan Peninsula).

I don't think Romania is actually part of the Balkan, at least not by that definition: http://en.wikipedia.org/wiki/Balkans#/media/File:Balkan_topo...

Croatia, Bosnia and Herzegovina, Serbia and Montenegro, Albania - they are certainly not good neighbors. Nice people and great scenery though.