Thank you for your coherent reply, erolz.
If we accept that a valid definition for "ethnic minority" is that of a group that has different national or cultural traditions from the majority, then it becomes evident that:
a) The word ethnic refers to national / cultural traditions and
b) The word minority refers to the population strength of the group
Nowhere in the above it is stated or even implied that the rights of a minority group should be denied or compromised in any way. Therefore, it is logical to assume that being a minority should not be a problem under normal circumstances. I can see your point regarding certain instances when as you write "being numerically smaller does matter". But again, in a politically healthy society there should be such mechanisms in the Laws that would protect any minority (or any other legitimate group of people) from any kind of oppression should these instances arise.
I believe that in Cyprus there is a problem with the way we all choose to use and interpret some words and "ethnic minority" and "federation" are two such examples. While I welcome your definition of a “Unified” Cyprus (= A Cyprus without ANY internal borders), I am afraid that in the minds of many this word is also being misunderstood.
Best regards
O.