In reply to FesteringSore:
Think they are basically Kurdish, therefore originally from Persia. There are plenty of blued eyed blonde Persians, they are not all sworthy Arab looking. Indeed Circassians, another turkic diaspora living within Iran, are often blue eyed and blonde people are famed for the fairness of their women.
The syncretic nature of the religion pretty much point to there was lots of miscegenation going on in their history, despite them now being endogamous.
D
Post edited at 17:55