Not to mention the blatant usurpation of the greek word "macedonia" without any linguistic, ethnic connection to it (ancient macedonians were greeks, not slavs).
https://en.wikipedia.org/wiki/Macedonia_(ancient_kingdom)#/m...
That region is still called Macedon and the modern inhabitants of that region are themselves called Macedonians. As opposed to the slavic macedonians, they do have strong historical, linguistic and ethnic connections to the term. Do you see the problem here?