Greater Pashtunistan

Some important points.

Nationalists are living in utopia if they think once they get their petty little states (Sindhu-Deshu, Pashtunestan etc.) everything will be fine and dandy.
India will fight Pashtunestan over the Indus, water, all sorts...

LOTD is living in a fantasy world if he thinks Islam is no big deal to Pashtuns just because it's no big deal to him. 95% of Pashtuns are hardcore Muslims.
The best option is for Pakistan to remain, but as a confederation of Islamic states (Punjab/Pashtunkhwaetc.) each with their own autonomy, respecting each others rights, they'll certainly be more sensitive to each others rights than India.

PS. Please don't use the term "Indian Subcontinent", just "South-Asian Subcontient" is more appropriate.