National interests always are above everything.. Democracy is for nation and people and not the other way. Pakistani newspapers night be writing material detrimental to national interests of Afghanistan.
Foreign newspapers are not sold on newspaper stands. Interested persons have to get by post. Apparently, Afghanistan has banned import of Pakistani newspapers.
Pakistan is a nation, which never trusts in healthy co-existence with its neighbors and other countries. They have their own problems, which need to be looked into and to detract people's mind from them they act so foolishly that other nations have no choice but to ban them.