Why isnt Balochistan and Khyber Pakhtunkhwa part of Iran or Afghanistan

[mena]

I mean the Greater Middle East and Africa are literally the only parts of this world with countries that integrate 2 or more ethnic groups which in size compete with each other. Now ask yourself why these regions are known to be so prone to conflicts.

do you live in kurdistan?

[Chocolate_Hound]

Culturally, Afghanistan is like Iran and Western Pakistan. The dominant ethnic group are Pashtuns (Iranic).

The terrain is Central Asian though.