Historicism of Identity of Yazīd b. al-Ḥuṣayn

In history of Shiism, name of some people has been recorded among Shias and companions of Imams; but when the reasons and the sources that have recorded such names are examined, the opposite of that claim is proven. In many of books, the name of Yazīd b. al-Ḥuṣayn has been recorded as one of Shias of Imam al-Ḥusayn (pbuh) and as a martyr of Karbala, whereas when the documents that have been adduced for proving the martyrdom of Yazīd are critiqued and their historical roots are found, not only cannot his name be considered among the martyrs of Karbala, but also according to the affirmation of old and valid history, Yazīd was one of enemies of Imam al-Ḥusayn (pbuh) who martyred Sulaymān b. Ṣurad after ʿĀshūrā and in Tawwābūn uprising and was alive in the time of ʿUmar b. ʿAbd al-ʿAzīz, the Umawī caliph; thus, to recognize real Shias, it is necessary for sources and documents to be explored according to principles and research rules in history