The problem with Balkans is wrong US policy after dissolution of USSR and changing from bipolar to unipolar world.
If Americans didnt bomb SR Yugoslavia we would probably enter NATO after taking over Milosevic, in peacefull way.
If America was smarter, Serbia, Croatia, Slovenia would be members of NATO before 2000. But they make wrong step and quess what? 95% Serbs have bad opinion about USA, Macedonians too, when "good guys" Albanians goes to Islamic State and swear to Baghdadi that they will kill and destroy America.
Instead of having whole Balkans except Albania in NATO pact, they have half of Balkans and anti Western Albanians who think that Western world leading by USA is the only offender for their poverty?
Life is a b*tch sometimes, Americans, isn't it?
Next time when you ask, why whole world hate your nation and why you lose ground to emerging powers, just look at your wrong moves, that unipolar world has a capacity to last for entire 21century, but you destroy it. Now it is forever lost.