Some claim, Altai people are blend of Iranic and Tungic (Northeast Asian) people. How true is that?

[Proto-Shaman]

Where does the Caucasoid component of Altia people come from then? From Persians, from Slavs, from Celts, from Armenians, from Greeks, from Dutch, from Germans, from French, from Italians or else?

From southeast moving Corded Steppians. Altaic speakers according to Coon. 0% Iran. Arioians had BMACian farmer dna at those times.