Oh, I can tell a lot only by looking at the hair.
Have You noticed that the most ethnic Turks in Turkey have thick straight hair like their Mongoloid cousins in Central Asian?
Even Armenians on average have thicker and darker hair than Kurds, but that is mostly explainable because Armenians have assimilated many Lom Gypsies. Many Armenians have 'Gypsy'/South Asian hair.
Kurds have thinner hair structure and sometimes our hair is very wavy. But it is not the same as the 'Semitic' hair. Not many Semites have straight hair and their hair is often also very curly, but their hair is different from the Northern West Asian hair structure because Semitic people (Southern West Asians) have a lot African blood in them and that is why their hair is similar to the Africans. Dark, wavy and curly hair, but at the time also thick hair.
But sometimes I see Kurds from Iraq who are clearly mixed with the Arabs who have also got the so called ‘Semitic’ hair, thick and curly.