They called it Barbaria because they didnt understand, might have thought the language to be too unique for the region, it happened too long ago to be sure: https://en.wikipedia.org/wiki/Barbaria_(region)
In general, a lot of people dont understand that even Chinese Han Empire and Roman Empire actually had contacts, they just never explored them any further “because my culture is clearly superior anyways”. They were aware the world was bigger than they controlled, but Persia was always inbetween
They (grecoromans) did travel the Red Sea, because Egypt traded through there with Asia, so they were interested: https://en.wikipedia.org/wiki/Periplus_of_the_Erythraean_Sea
They called it Barbaria because they didnt understand, might have thought the language to be too unique for the region, it happened too long ago to be sure: https://en.wikipedia.org/wiki/Barbaria_(region)
In general, a lot of people dont understand that even Chinese Han Empire and Roman Empire actually had contacts, they just never explored them any further “because my culture is clearly superior anyways”. They were aware the world was bigger than they controlled, but Persia was always inbetween