To add to this point, 'Roman' was not an ethnicity. The actual Italo-Romans became increasingly irrelevant after the Five Good Emperors, of whom two out of five (Trajan, who expanded the empire to its furthest reaches, and his successor Hadrian of kike-destroying fame) were Spanish. There were
Africans (not kangz, but the mutt descendants of the Carthaginians + local Berbers + incoming Italic settlers),
Arabs and a hell of a lot of Illyrians (from modern-day Croatia & Bosnia, far predating Slavic settlement of those regions) ruling the empire in its last two centuries of existence.
The last remotely capable Western Emperor was Gallic, which is to say, proto-French - his ancestors probably got raped by Caesar's legions and those same legionaries would be appalled to learn that their enemies eventually ended up ruling their country (and doing a much better job of it than the 'pure' Italo-Roman senatorial niggers who eventually backstabbed him in cahoots with the barbs).
'Roman' was always more of a nationality rather than an actual ethnic marker, similar to how there's no shortage of Americans today who are of Irish, German, Italian, etc. descent. Even in their earliest days, well before the Empire, the Romans were absorbing non-Latin peoples like the Etruscans - who were probably a pre-Indo-European remnant population and thus to the Romans what the Dravidian dasa/proto-dalit types were to the Aryans who first stormed into India - as well as the Greek colonists of Magna Graecia (southern Italy).