Also it is instructive to bring Roemer's quote in Full: ""Given the powerful impetus which animated the Qizilbash, their rise to political power ought to itself to have brought about a Turkicisation of Persia, but things took a different course. Even though fewer and fewer historians still maintain the view that the Safavid empire was a Persian national state, it is undeniably true that the state founded by Ismai'l was from the outset exposed to strong Iranicization tendencies, which ultimately led to the integration of the Turkomans. At all events, there can be no question of Turkicization of Iran at the hands of the Safavids. How is this to be explaind?...". So Roemer is saying that events took a different course from "Turkicisation of Persia".  
 Fast forwarding in the same section:  ""The final chapter of these dramatic events saw the destruction of Turkmen supremacy by Shah Abbas I..."