Some excerpts from Anatole A. Klyosov, The principal mystery in the relationship of Indo-European and Türkic linguistic families, and an attempt to solve it with the help of DNA genealogy: reflections of a non-linguist, Journal of Russian Academy of DNA Genealogy (ISSN 1942-7484), 2010, Vol. 3, No 1, pp. 3 - 58:
The next section relays the story about of opposition between “Iranists” and “Türkists”. Actually, the opposition does not exists literally, it is rather a figure of speech. Too unequal were both sides to call it an “opposition”. But this figure of speech reflects the essence of the problem. Ever since the beginning of the 1950s, the official historical science postulated that the Scythians were “Iranian speaking”. The issue was not to be discussed any more. Any arguments and scientific evidence on the subject were not acknowledged by the official science (and that the official science exists is beyond discussions), or reacted to with dead silence for at least 60 years. ... the Scythian people - in fact, a collective term, were both Türkic-lingual, and “Iranian-lingual”, or more accurately, Aryan-lingual. They were both nomadic pastoralists (which is typical for the Türkic tribes), and farmers (which is often typical for the Aryans). They had both haplogroups R1a1, and R1b1. They lived in felt yurts (many of those who lived in them, were carriers of R1b1), and also in stationary buildings (many of those were farmers, R1a1). Unfortunately, neither the specialists in the Indo-European languages, nor the Turkists are willing to recognize the duality (at least) of the Scythians, Sarmatians, and many other steppe (and not only steppe) tribes of the 1st millennium BC and the beginning of our era. Moreover, these tribes definitely had other haplogroups, in the first place G, Q, N, C. The carriers of the haplogroup G in the Scythian and Sarmatian times likely were “Iranian-speaking”, and lived in the Iranian Plateau much earlier then the Aryan times. Then, of course, they were not “Indo-Europeans”. The carriers of the Q, N, and C were most likely Türkic-lingual. ...
I.M. Miziev “History around us” (Nalchik, 1990, cit. per T.A. Mollaev “A new perspective to the history of the Ossetian people,” 2010, p. 6):