Yep, you enter and conquer Persia as a small ruling class, its easier to adopt their language and customs then to force yours onto them. Its been the same anywhere the Turks conquered.
Even now the whole "political islamist" politics is about a class of people taking control of Turkey and then trying to take control of the surrounding Muslim regions. Its not cause they care about religion, its purely power and politics.
The Turks will talk about a united ummah but in reality we just want to dominate.
Same story with the Arabs and the Persians.
We all want to dominate for the mantle of Islamic leadership. With this we believe we can unite all Muslim countries under one banner.
Can you imagine me going to some Iraqi and Saudi tribal people and say you now under the rule of a Muslim Turk super state they will quickly execute me.
This is the problem with political Islamists they just cant accept the differences in ethnic groups, customs, clans, tribes, races you name it we believe we can easily unite people under religion.
Seriously Islamic history a lot of the Muslims regardless of Turk, Arab, Somali, Persian, Berber, Malay we all spent fighting each other rather than uniting.
Only we can unite people is with bloodshed. I mean before the Ottomans became an empire they had to fight the various Turkish beyliks to take control.
If only people read some history and see this shit continues today.