I was thinking something more like the Germanic Invasions of Italy, North Africa, Spain, ect. during the Great Migration being viewed as a result of the racial degradation of the once-Pinnacle Blooded Romans, where the still purely Pinnacle Ostrogoths and Visigoths, Lombards, ect established themselves as rulers over the degenerated Romans with the cooperation of those few still remaining of Pinnacle Blood, but the “already horrifically degenerated” Byzantines destroyed their efforts in the Gothic War and their reconquest of North Africa from the Vandals. From there, the Lombards when they established their rule over Italy after conquering it from the Byzantines are seen as attempting to establish something similar, but being largely unable to as the Byzantine invasion of Italy and the Plague of Justinian had already wiped out most of the last of the Pinnacle Blooded people in the region, and the Lombards ended up being conquered by Charlemagne and the Visigoths in Iberia began to degenerate without the presence of a Pinnacle ruled Italy and North Africa, resulting in them being conquered by the Umayyad’s, and the full Infeeization of Iberia and Italy.
There would likely be some debate on when the Byzantines became “fully Infeeized”, with some saying it was fully complete by the time of the Gothic War and some saying that the process was still ongoing at that time and that Justinian and the rulers of the Byzantines were still of Pinnacle Blood but ruling a population which had already had large parts of it become degraded, and their arrogance in wasting resources fighting fellow Pinnacle Men and destroying the Ostrogothic and Visigothic Kingdoms, and making use of Infee forces like Slavic cavalry against fellow Pinnacle men (like when Justinian sent 1,600 cavalry mosty made up of Antes and Slavs to help Belisarius during the invasion of Italy), instead of focusing on fighting the “Infee” Persians and Slavs, led to them losing god’s favor, which caused the Plague of Justinian and left their frontiers vulnerable, leading to the Arab conquests and the Slavic migrations into the Balkans, which together with things like the settling of various Slavic Groups in depopulated areas of Asia Minor and the Balkans by various Byzantine Emperors led to the last Pinnacle Greeks becoming fully inferior.
I think one of the reasons they’d say that Anglo-Saxons are so Pinnacle is that Roman troops had already been withdrawn from England by the time that all this would be viewed as happening, so the Anglo-Saxons when they conquered England would be seen as having absorbed the existing Roman population in sub-Roman Britain over the course of their migration into England and in the process prevented their degradation through a fresh influx of Pinnacle Saxon and Angle Blood and them fighting off Infee groups like the Irish which raided into Britain. That pseudo-history would also give more legitimacy in their own eyes to their Roman aspirations and cultural elements because “After all, we are the descendants of the Last Pure Romans!”.
…I see what y’all meant about how this detailed discussion of pseudoscientific racial theories and history would definitely get us on watchlists in any other context.