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Undoubtedly they are Turkics. First of all their culture and customs are Turkic.
they are nomads, fight on horse back use bows thats typical.
But drinking blood of their horses is the ultimate proof that's an ancient Turkic ritual/custum Hun/Gök and other Turks use to do that to. No other people than Turks do that.
-Most eurasians fought horseback, including Iranic peoples such as parthians, scythians, sassanids.
-Yes some Turks and Scythians would have (some) similarities because they lived near each other. But that does not make them Turks Scythians or Scythains as Turkics. Also the Scythians are older, mentioned earlier, I think it would be more correct to say some turks their culture and customs were from Scythians than other way around.
-Some Turks were called Persians by the Romans, are Turks Persians? no
-Alans were Iranic speaking people who were from Scythians. Todays ossetians speak an eastern-Iranic language and their ancestors are the Alans.
- Scythian religion is assumed to have been related to the earlier Proto-Indo-Iranian religion, and to have influenced later Slavic, Hungarian and Turkic mythologies, as well as some contemporary Eastern Iranian and Ossetian traditions.
- Mounted archery was a defining characteristic of the Eurasian nomads during antiquity and the medieval period, including Iranian peoples (Scythians, Sarmatians, Sassanids) and Indians in antiquity, and by the Mongols and the Turkic peoples during the Middle Ages.
- They did horse sacrifice: Many Indo-European religious branches show evidence for horse sacrifice, and comparative mythology suggests that they derive from a Proto-Indo-European (PIE) ritual. Other elements of their religion was also Indo-European
- Their names, small fragments of text appear to be Eastern-iranic