Half Greece named Macedonia 1000 years now , all the North Greece actually.
Before 25-30 years previous government of FYROM named their country Macedonia , started named airports everything Alexander etc etc .
Greece didnt accept all this clown fiesta , we understand that at the years of Great Alexander a part of FYROM was in Macedonia , BUT Alexander boned- lived- died here , we have this name from ages , when someone go and put same name , and we share same borders , our Macedonia and them , you never know what they wil ask tommorow.
Anyway they want to join EU , we dont accept , now after 30 years they will rename everything and they will join EU .
Its a bit more complicated , i tried to tell the basiks.