>>17983458
It's not a mystery. Greece, southern italy, and anatolia, which were home to east med profiles, were extremely overpopulated in classical era, so they moved everywhere, not just Italy but also france, spain and the balkans, and shifted everyone basically east. Almost all samples are eastern shifted compared to the iron age.
Nords didn't leave much genetic impact.
People get confused, the goths, which wanted to impose themselves on the native italian population, got genocided by belisarius (roughly 200k victims in the graeco-gothic wars) and the modern source of celtogermanic dna is lombards and franks, which were more peaceful, accepted to learn latin etc..