If you believe that Parsis must only marry Parsis; that prayers cannot be recited at the Towers of Silence for those being cremated; that non-Parsis cannot view the Parsi dead at the funeral; that Parsis cannot adopt, and children of interfaith married Parsi women (IMPW) are not Parsis; you qualify as one of the mainstream orthodox.
If you believe that preservation of Parsi racial genetic purity is the essence of the faith; that children of interfaith married Parsi men are not Parsis either; that there should not be electricity in fire temples; and that Parsis are not in a demographic decline;......