(they're all Chechen)
Islam was the biggest melting pot since Rome and wasn't seen again since the Americas. They scrambled the genetic fingerprint of every territory they administered, from Al Andalus, Sicily and the Balkans to India and the Caucasus. Arabs, Berbers, Persians, and Turks swirling and swishing around enormous slave populations from as far north as Iceland and as far south as Madagascar.
I like the ridiculous account of the Russian security agent stopping the guy on the cold Checheness of his eyes.