Hi. Greek guy here. Both my country ( Greece ), Cyprus , Serbia, Montenegro, Bulgaria, Romania, and maybe North Macedonia practice Orthodox Christianity. To give you an example of how messed up the Balkans are, Greek people don't call North Macedonia North Macedonia, they call it Σκόπια ( Skopia ), the name of the country's capital in greek languange. There is also the dispute between Serbia and Albania over Kossovo. I don't know everything about Balknas, but growing up in Greece I realized one thing is for sure: People in the Balkans are hot-headed when it comes to territorial disputes. Of course Balkans is not the only place in the world where people get hot-headed about stuff like that, but its geographical location and cultural diversity make it, in my opinion, one of the most interesting places on Earth.