The people on this thread want the border of 2000+ kilometers closed.. 3000 kilometer border with India closed.. That leaves Iran with whom relations are bad and China.
Of course they cannot keep it closed. Sooner or later it will be opened. Closed border will hurt them as well. The internet warriors don't know the ground realities and mostly live in other countries or far away from the border, so it's easy for them to make all sorts of statements.
Afghans will find other solutions. Blocking Nato supplies for too long.. Once Washington starts blocking military funds...