The decline of Hinduism in Pakistan is more recent, and largely
coincides with when they gained independence - 1947. A lot of Hindu's
left for India, with a lot of Indian Muslims migrating to Pakistan.
In Afghanistan one of the lesser known projects in progress is
Afghanistan Highway 1. I read a few years ago (but have been unable
to find the article recently) that the intent of this "Ring Road"
around the nation connecting most of the major cities is to
socio-economically-culturally-politically influence Afghanistan away
from Pakistan, towards India.