The correct answer is - Serbia.
Slobodan Milosevic is the infamous former leader of Serbia. We can freely say that he had Nazi tendencies and ideologies. He is the most responsible for the violent and terrible break up of Yugoslavia, when he first attacked Slovenia without any real reason, after that got engaged into war with Croatia and Bosnia and Herzegovina, committing genocide, and also had Macedonia on his eye but never managed to go to war with it as well. Apart from performing genocide in Bosnia, he also did so in Kosovo, though the Albanians in Kosovo performed genocide over the Serbians too, and was probably responsible for the attempted assassination of Macedonia's president Kiro Gligorov, as well as the assassination of one of the prime ministers of Macedonia. His reign ended up when NATO bombarded Serbia, and he ended up eventually on trial for violation of pretty much everything humane in Hag.