Did you read that article there about Genetic comparison of the Balkan nations against ancient nations. It's quite interesting research from iGENEA.
I'm always sceptical about this kind of researches. First of all they are rarely completely neutral and second, i've seen it how with the DNA of the mother and the father, the scientists couldn't claim for sure that a body found in the river (dead for 5 months) is of their son. 5 months and they couldn't even put a percentage. Here we're talking about thousands of years.
I only agree with the last part "No country in Europe is today genetically homogeneous"
Anyway, this has nothing to do with your current problem. It's a problem for the historians, it mustn't be a problem of your identity. No-one has the right to tell you what you are, how to feel and how you should call yourselves.
For generations you identify yourselves as Macedonians. Now someone, who is stronger than you, is forcing you to change your name just so they could hide a historical injustice.
That's unacceptable. What's even more unacceptable is the behavior of the European superpowers who tolerate what your southern neighbours are doing to you.