^^^It isn't even about that. Its more about the completely non-viable nature of an independent secular J&K.
Scenario 1:
The Indian Army unilaterally vacates the kashmir valley. Every mujahideen from Iraq to Afghanistan to Chechnya will be dancing in the streets of Srinagar before you can say "jehad".
The few secular voices will be silenced, and we will have a new terrorist hub and recruitment centre.
Scenario 2:
The Indian army unilaterally vacates the entire J&K region. Immediately a bloody civil war will erupt between the Hindus of Jammu and the Muslims of Kashmir. The ratio of muslims to hindus is around 60-40, so it won't be a short one either. India will support the Hindus by proxy and Pakistan will support the Muslims, with help from Afghanistan of course.
Meanwhile China says "what the heck" and takes Ladakh.