"I propose we start classifying Turanians as "white""
I disagree. Doing so would confuse our existing message that "whiteness" did not exist before the Renaissance.
Turanians typically only cared about the Turanian patrilineal bloodline. The offspring of a Turanian father and a non-Turanian mother is Turanian, whereas the offspring of a Turanian mother and a non-Turanian father is non-Turanian. Their breeding strategy has typically been for Turanian men to impregnate both Turanian and (especially) non-Turanian women in as large numbers as possible, thereby displacing non-Turanian male bloodlines around the world. In other words, Turanian racism is directed against non-Turanian men only. This is quite different from "white" racism, in which only offspring who have two "white" parents are considered "white".
(With that said, I am open to the possibility that male WNs who are sexually attracted to "non-white" females are likely to have more Turanian blood on average than male WNs who are not sexually attracted to "non-white" females.)
"demolishing the myth that Turanians are "Aryans"."
Just focus on the etymological approach, which is both irrefutable and easy to explain.