Thank you for the word 'some'.
Zoroastrians and Hadith, History and forgery is another topic and as you know, I do not reject that some of them just like Arabs (their jurists or Historians) themselves or Jewish or Christian scholars in Muslim disguise, have changed the truth of many things.
But this case is another one, Abbasids's Vazirs were Zoroastrians according to the claims of some the dear scholars of Ourbeacon, So why did they persecute their corelegionists in their motherland (Persia)? Maybe beacuse they opposed Abbasids authority, maybe but even after Abbasids we find many cases that Muslims disrespected Zoroastrians. Why did Zoroastrains migerated to India if Persia was suitable to live.