The doctrinal conflicts during the Abbasid epoch and the role of Turks & Persians therein

The Abbasid epoch has witnessed the outbreak of the doctrinal conflicts between the Sunnis and Shiite in the second Abbasid epoch in particular and it reached its climax within the Bouihi epoch, where the ardent Turkish-Persian conflict in the second Abbasid epoch has played a pivotal role therein, knowing that the majority of Persians areShiites and Turks are Sunnis and both of them have played a role in agitating such conflicts which played a negative role individing the Muslims to conflicting factions, that resulted in inextinguishable bloody conflict that has not reached an end until the end of the Bouihi epoch.
On the other hand, such conflicts have not taken place accidently, but their causatives which will be discussed later were deeply rooted from the foundation of the Abbasid stateto the ups and downs among the relationships between the official state authorities and the Sunnis and Shiites till the Bouihi epoch that has seriously .witnessed the effervescence the doctrinal conflict
This research is discussing the ardent Sunni-Shiite conflicts, where the Turks and Persians have often playeda role therein.