greeks and romanians are unique (unique languages) and culture is honestly a derivation of language so they have the right to be nationalistic. but all of the slavs are just npc slavs (slavs are all pretty well the same from russia to slovenia with some minor differences according to diff genetic inputs eg russians are mongolic and cros/bosnos/serbs are somewhat albanic/romanic). but u know how spain has a distinct culture that comes to mind when u think of it ? (bullfighting, passion, paella) germany (cookoo clocks, efficiency, structure) italy (rome, food, wine, expressiveness) etc. croatia/serbia/bosnia are just kinda "there", identifying with whatever larger powers are around them. i mean think about it when u think "serbs" what do u think that is so distinct from "bulgars" or "russsians"...nothing really. they're just a derivation of "slavic types". there is nothijg distinct about them they are just kinda colonies of slavs...nothig to them rly.
Canada