What is Amir's ethnicity in The Kite Runner?

Like Baba, Amir is a Pashtun. The Pashtuns have long been
the largest and most powerful ethnic group in Afghanistan, and nearly all of the
nation's leaders for more than 300 years were Pashtun. They are also the second largest
ethnic group in neighboring Pakistan. The wide differences in the ethnic group are best
illustrated by the character Assef; although he and his parents are Pashtuns, Assef and
his family consider Baba and Amir traitors to the group, in part due to Baba's
friendship with Ali and Hassan--both members of the Hazara ethnic group, considered the
lowest and the most persecuted in Afghanistan. Baba is a far more tolerant and liberal
thinker than Assef and his family; Assef, like many other Pashtuns, joined the Taliban
following the departure of the Russians.