I think I get your point, but you need to re-phrase the zombie apocalypse part.
Afghanistan is a country that has been fractured by civil war or the fight against invaders for all of its living memory and is struggling to find unity.
A zombie apocalypse on the other hand is a fictional event in which a horde of brainless demons tries to kill all humans.
I'm sorry that I've offended your sensibilities, but there is a strong parallel with the chaos in Afghanistan (or Somalia for that matter) and a zombie apocalypse. Two parallels in particular stick out: there is no strong central authority, and there is the constant threat of violence. For zombies, the violence is directed toward "eating brains" or something equally ridiculous, for Afghans the violence vector is directed toward "anyone who disagrees with me or who I or my tribe doesn't like", and seems particularly informed by Islamism and hatred of the West.
Further, the problem of 'infection' is very similar. Even if you create a "safe zone" it's not necessarily safe. Consider the recent rash of killings when our Afghan "allies" have turned on US servicemen, killing them in cold blood in so-called "Green on Blue" attacks. (About 100 servicemen have been murdered in this way in the last 3 years).
Afghanistan is a country that has been fractured by civil war or the fight against invaders for all of its living memory and is struggling to find unity.
A zombie apocalypse on the other hand is a fictional event in which a horde of brainless demons tries to kill all humans.