Done and done!
Ok, so, Ammatar v Nefantar.
My personal position is pretty simple. Who decides who’s Nefantar and who isn’t?
The Nefantar Tribe do. I mean, it’s them. They get to say what it means to be them or not.
From an outside perspective, though… As near as I can tell, their distinctive, re-establishing decision was the rejection of being Ammatar, and their return to the Tribes, followed by the establishment of a Tribal government and Tribal Chief, in rejection of Amarr supremacy.
The Ammatar, in contrast, actively rejected the idea of being a Tribe, or members of a Tribal society. Some, apparently, made this decision out of necessity to political reality with the hope that their children or grandchildren could reverse it, some out of legit conversion. But the defining traits of ‘what caused this group to become this group’ are, in turn, adherence to the Amarr Faith and Society while rejecting the Tribal culture, vs adhering to and attempting to reconstruct their Tribal culture while rejecting the Amarr Faith and Society.
Logically, then, it follows that self-identifying ‘Nefantar’ who adhere to Amarr culture/beliefs… are misrepresenting themselves. It’s unlikely to be out of any desire to do so. Rather, they may just not know what the Nefantar Tribe stands for, these days. Similarly, any self-identifying ‘Ammatar’ who rejects Imperial culture in favor of Tribal culture would be misrepresenting themselves, as well.
But ultimately, like I say, the Nefantar Tribe would have the authoritative criteria, if such criteria exist.