For contemporaty Greeks, however, it is a different matter, as it is an article of faith among most of them that the Ancient Macedonians were Greek, … - Eugene N. Borza

It is clear that over a five-century span of writing in two languages representing a variety of historiographical and philosophical positions the ancient writers regarded the Greeks and Macedonians as two separate and distinct peoples whose relationship was marked by considerable antipathy, if not outright hostility.

Thus it is clear that Tito did not invent either a Macedonian ethnicity or a Macedonian language—as has been alleged—when he created a Macedonian Republic as a part of the postwar Yugoslav federal state...Tito's policy, was the culmination of a process that had been under way for the better part of a century; he provided legitimacy, for Macedonia and accelerated a natural passage of nation-building already well under way.

By 1875, however, the first tracts appeared favoring a Macedonian nationality and language separate from standard Bulgarian, and the conflict had been transformed from an anti-Hellenization movement into a Bulgarian-Macedonian confrontation.