Why Do the Majority of Sardinians Have I2?

[Kess]

https://www.researchgate.net/publication/337328446/figure/fig1/AS:826610873810946@1574090798260/Proportion-of-the-observed-Y-chromosome-haplogroups-in-the-three-main-cultural-and.png

[Dentist]

Hunter-Gatherer men killed Neolithic men and took their women

[Petalpusher]

It's late euro paleo in origin but tied to neolithic Balkan and some subclades like M26 are more western specificially. Some male local hunters were just assimilated back into neolithic cultures.

https://www.eupedia.com/images/content/Haplogroup_I2a.png