As for Turks, look for a solid middle class background. There is a middle class and they are educated and honorable westernized people. They assimilate when they emigrate. The other classes are highly suspect. The Turkish middle class is laying low. They get in their digs when they can. There have been riots and protests but they are pretty harshly dealt with by the aspiring Caliphate.
If they say they aren’t followers of Islam, then cross-screening by language is not necessarily a good indicative for radicalization or terrorism before they are issued a visa to enter the US.
Also, India’s official languages are Hindi and English; yet India has the 2nd largest muslim population in the world after Indonesia, and the muslim population is growing really fast there. These Indians are India’s nationals and passport holders.
The middle class Turks assimilate fairly well. Though, the Turkish cop who shot the Russian Ambassador also came from a middle class family. As did a few of 9/11 terrorists, if we only consider ‘middle class’ and western education only. BTW, Turkish (or a close dialect of it) is also spoken in Azarbaijan, Turkmenistan and a handful of other Turkic speaking southern ‘stans’ bordering Russia.
If we go by current and past trends of terrorism or radicalization (in the west), Arabic speaking Sunni muslims definitely stand out, followed by sunni North Africans, who are often second or third generation western Europeans, and/or have returned from war zones such as Syria, Iraq, and Afghanistan. Some of whom may speak Arabic. The last significant group are Chechens, and to a lesser extent from southern ‘stans’. All sunnis, mostly from distinct countries not all on Trump’s list.
Ultimately, If an Islamist group seriously wanted to run an operation in the US, it could tap into any muslim group or individual (born or convert) from any country.