OK, you're really starting to get desperate. Did Ptolemaic Egypt and Gaul just decide to unite 'because they identified with one another?'
I'm not quite sure how that relates to what I said. In any case, both of those are excellent examples of political communities which did have cohesive identities and ideologies that justified their existence, but did not rely on nationalism. What people in Ptolemaic Egypt had in common was that they were ruled by the Pharaoh/Basileus (depending on how you chose to see things) in Alexandria. The rightful borders of Ptolemaic Egypt were defined as the territory that the Pharaoh/Basileus could lay his hands on, and his authority as a leader was his descent from Ptolemy I, who was given authority to rule the entire Macedonian empire by Alexander (again, this took a bit of choosing to see things the right way), or alternatively that, as Pharaoh, he had the divine mandate of the gods to rule Egypt and conquer lesser peoples. Likewise, being a 'Roman' meant being a subject of the Roman empire, with the various legal rights and responsibilities that came with that: the proper boundaries of the Roman empire were the whole world (but some of it they chose not to administer directly, of course), and they were so because the Roman Empire was ruled by the people of Rome, to whom Jupiter had granted 'empire without end'.
Neither of those are nationalist in the slightest. They're both a long way from the legitimately nationalist arguments used to argue that Holstein should have been incorporated into the German Empire - the argument there was that the people of Holstein were part of the German Nation, despite living in Denmark, and that the rightful borders of Germany encompassed all of the people who belonged to the German nation (plus whichever non-European territories that they could get hold of, but that's part and parcel of the sort of imperialism where you only count as a person if you live in Europe).