Bagi orang yang berpendapat dan menisbatkan syiah berasal dari ajaran Persia kuno, Mazdakisme, yang menentang Zoroastrianism terutama tuduhan tak berdasar tentang Nikah Mut'ah sebagai tradisi ajaran agama Mazdak, semua hal tersebut tidak berdasar....

At later stages the conservative Zoroastrian opposition accused Mazdak's followers of heresy and with abhorrent practices such as the sharing of women, for which scholars have found no evidence. Mazdak's followers are considered to be the first real socialists in human history by their emphasis on community property and community work with benefits accruing to all.
(Manfred, Albert Zakharovich, ed. (1974). A Short History of the World 1. Moscow: Progress Publishers. p. 182, Wherry, Rev. E. M. (1882). A Comprehensive Commentary on the Quran comprising Sale's translation and Preliminary Discourse. Boston: Houghton, Mifflin and Company. p. 66., http://en.wikipedia.org/wiki/Mazdak)