>>76417008
>>76417056
The Y chromosomes in Iceland is pure nordic viking, while the X chromosomes is a mix of female nordic vikings and female celtic slaves. This means that Icelandic men always has a full viking Y chromosome, and the Y chromosome is the only thing that really matters. When you look at Hafthor, his dad and grandad, its clear that the Y chromosome carries that giant viking nord gene.
Meanwhile english people are mixed mutts, and english men aren't ensured giant nordic viking Y chromosomes. There is tons of peasant english celtic Y chromosomes floating about in the population.
So even though on the surface they may have similar genetics, in reality its quite different.