Not an expert but I don't think that still qualifies as biological differences in races. I mean, obviously we are all biological different and it seems obvious as well that if a group of people stays isolated enough it will develop and reinforce differences to other groups.
For example the Basque population has clear genetic differences to the rest of the Iberian and Westerner population [1] but that doesn't make them a different race.
Race is just a social construct, mostly based on visual traits.
For example the Basque population has clear genetic differences to the rest of the Iberian and Westerner population [1] but that doesn't make them a different race.
Race is just a social construct, mostly based on visual traits.
[1] https://www.ibe.upf-csic.es/news/-/asset_publisher/PXTgqZXxl...