@calgacus
where do you get so many wrong ideas? you have transformed this thread into a history discussion thread.
1) Ali is Mohammed's relative, they are both arabs. You have the same Timur approach for Ali now

however, this is even worse. islamic state expanded lands into west and east, including Persia.
Why Persia became Ali supporters (shi'i sect)?
after 4 caliphates, Islam seperated into 2 sects. sunni sect was represented by Muaviye and Ummayyad Dynasty, a dynasty of arabic nationalists/extremists. So Persia's becoming shi'i was mostly a national pride. but both sect's leaders were always arabs. none of them had persian origin. and the shi'i sect capitol was not in Persia neither, it was in Iraq. The holy places for shi'i sect is still in Iraq. So
there is no direct connection between Ali and Persia. Only that, today's Persia/Iran is the most populous country of Shi'i sect. Ali's successors also claim that they are Mohammed's relatives, which means they claim to be Arabs.
2) Turks in central asia were always turks, not turkified mongols.
you might can argue that central asian turks and Turks in Turkey don't look like each other. Well, that's mostly because that Turks in anatolia have combiend with many other nations for a millenium. So central asian turks are genetically more "pure".
3) Tajiks and Pushti people (Afghans an some citizens of Pakistan) are of persian origin.
4) Ancient Turks' religion was Tengriism just like mongols. It is a type of shamanism. It is similar to paganism but it is not paganism. Turks mostly turned to Islam. And the ones who have turned to Christianity are generally "lost" within other cultures.