I2 clades in Sardinia and among Basques are not even I2a1b, they are separated from I2a1b "Dinaric" by more than 17.000 years. You obviously know nothing about it since you are so naive that you grouped all I2 together.
I2a1b "Dinaric" is not native on Balkans because:
1) Highest diversity of it is in Poland. Dr. Ken Nordtvedt estimates that TMRCA of I2a1b Dinaric lived in Poland 2500 years ago, and that it's current spread is a result of sudden expansion that happened 2000 years ago.
2) Older clades of I2a1b, "Isles" and "Disles" (Dinaric split from Disles) all live predominantly in NW Europe today.
3) Ancient I2a1b were not found in southern or eastern Europe. Tested Thracians, for example, were mostly R1b, J and E.
I2a1b was found almost exclusively in hunter-gatherers of northern and western Europe:
-Most of hunter-gatherers from Motala in Sweden were I2a1b, one from Loschbour in Luxembourg was also I2a1b:
http://www.nature.com/nature/journal...ture14317.html
-Several of hunter-gatherers on Gotland were also I2a1b:
https://genetiker.wordpress.com/2015...ne-age-sweden/
-One hunter-gatherer from northern France was also I2a1b:
https://genetiker.wordpress.com/y-sn...-berry-au-bac/
Motala12 sample from Sweden was positive on L147.2 SNP marker (Dinaric-defining marker), so it could easily represent earliest I2a1b Dinaric.
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