>brownmutts, but not all of them
No, it's all of them. If we're talking about genetics then Iranians are much less Aryan than many pajeets. Eastern Jatt Indians are 50% steppe while Iranians are less than 30%.
>There were/are blonde and red haired ethnic Persians
When you have a mutted populace, a few mutts will win the genetic lottery and inherit atavistic traits. They're still mutts, just with the rare case of blonde hair, just like how some Amerinigs have blue eyes.