I think it is also necessary to focus on the conflict between Shah Ismail(he was 100% Turkish) and Yavuz Sultan Selim(Selim I.). The reason of this conflict was government policies. The Ottoman Empire used Sunni Islam as the state policy and Shah used Shiite Islam as the state policy. You can find more about this in the book called, History of The Ottoman State, Society and Civilization which edited by E. Ihsanoglu and in the book, pages between 27-31.