The way FYRoM's ex-Yugoslavs have chosen to self-Identify defies the rules of logic and ridicules the demographic history of the Greek [Haemus] peninsula. They are known by their parent-ethnicity which is Slavic, but they consider this term a racial slur - now they have alienated Slavdom.
The rules governing the way peoples introduce themselves to strangers, and the way they Identify generally, follow simple rules of logic. The Greek formula for self-Identification and for self-determination follows these simple basic rules: Greeks would introduce themselves by their regional-tribal Identity in the first instance, followed by their parent-ethnicity in the second. The person meeting and greeting the Greek is under no illusion with whom he has just met, and is in contact with.
If we apply those simple rules to FYRoM's ex-Yugoslavs, the outcome would be predictable and unsurprising. If the peoples of FYRoM used the same formula to self-Identify by their regional Identity in the first instance, and parent ethnicity in the second, the result would meet expectations.
They would take-on the name of their region first, and then, the name of their parent-ethnicity second!
Because FYRoM was renamed Macedonia in 1944, and because the geography there actually coresponds to the latin-Roman administered region of Macedonia Secunda Salutaris, FYRoM's ex-Yugoslavs have justification using the Macedonian-name by it's regional-geographic connotation - Macedonians regionally, followed by their parent-ethnicity which is known to be Slavic.
Slavic is parent-ethnicity to more than 300 Million regionally diverse people-groups...like Scandinavian is parent-ethnicity to approximately 20 Million peoples in geographic closer proximity - like Germanic is parent-ethnicity to over 100 Million people-groups scattered world-wide.
It used to be that when an individual introduced himself as Macedonian...the person in contact was left with illusions he just met a Greek, but all that has changed now...from since FYRoM entered onto the world stage and proclaimed itself Republic of Macedonia, where the peoples there self-identify as Macedonians in the ethnic and racial sense and cultural-linguistic sense - even though the people they are contact with know them differently as Slavs, from Serbian and Bulgarian stock.
Using the Greek formula - FYRoM's ex-Yugoslavs would keep the Macedonian-name courtesy of regional-Identity, followed up by Slav, their parent-ethnicity...Macedonian- Slav for all intense and purposes!