In pre-Islamic times, the ethnicity of the peoples in Central Asia was mostly East Iranian. Like the Bactrians, Sogdians and Scythians, with Zoroastrianism as the main religion. But after Islam, many Turkic Peoples moved to the region, like the Kazakhs and Uzbeks, bringing Islam to the region, too. But what if the Muslim dynasties never made it to Central Asia, and didn't bring Turks with them?