They are not like you. Afghanistan is not a focused Nation. They consist of many Groups having different agendas and bad blood with each other. The Opposition forces including Religious Right Groups like Taliban and Hizbe Islami have their own goals and motivations. Even government coalition is not a united fornt.
The Dostom Led Uzbeks in Junbishe Milli , the Tajiks of Jamiat e Islami, And the Pro-Government Pashtuuns and so on.
Afghanistan Population is divided between pro Government and Anti Government Fronts. Survival comes first and Nationalism comes second. The Government coalition is vastly dependent on American Money and Support as they have to run the government while The Opposition forces are only limited to Insurgency warfare.
Differences among Afghans are much much worse then united nationalism which is sad and unfortunate. Dont compare them With Pakistan or Iran or Even war torn country like Iraq for the sake of comparison. Decades of Dancing on tunes of foreign powers have blurred their National Fabric. Now its battle for Survival for every group against the other by hook or by crook. Their Leaders have betrayed them for decades now