The propaganda campaign in Greece has been forceful. And one need not look to Greek governments as the source of the propaganda; the feelings are wid… - Eugene N. Borza

Who were the Macedonians? As an ethnic question it is the best avoided, since the mainly modern political overtones tend to obscure the fact that it really is not a very important issue. That they may or may not have been Greek in whole or in a part--while an interesting anthropological sidelight--is really not crucial to our understanding of their history. They made their mark not as a tribe of Greeks or other Balkan peoples, but as Macedonians. This was understood by foreign protagonists from the time of Darius and Xerxes to the age of Roman generals.

There is no reason to deny the Macedonians' own traditions about their early kings and the migration of the Macedones[..] The basic story as provided by Herodotus and Thucydides, minus the interpolation of the Temenid connections, undoubtedly reflects the Macedonians' own traditions about their early history.

While the 1971 OED may regard the use of the word "ethnicity" as obsolete, no adequate substitute for the word exists.