This is all hogwash, a feel good fairy tale spun to keep up the morale of the jehadis. Things are going to get worse for Pakistan after the withdrawal and probably better in kashmir. Because:
> America is not going to abandon Afghanistan completely. At least two divisions worth of US troops will be permanently stationed there.
> A kind of civil war will break out with scores of warlords jockeying for power fighting each other. Then there's the Northern Alliance, Afghan Taliban, Central Asian Republics, Iran, China, Pakistan, India, Russia - all vying for strategic advantage for exploiting the vast natural resources of Afghanistan.
> Pakistan would be a bit player in this game, but will continue to support the Afghan Taliban (Haqqani) in their quest to rule Afghanistan however long that takes. After all, Pakistan has been doing just this for the past several years in the hope of installing a pliable Taliban government at the helm for achieving that mirage of 'Strategic depth' against India.
> In this cauldron, the LeT and its affiliated terrorist groups will be diverted by Pakistan to help the Afghan Taliban in their quest for power. And that could take the better part of a decade. After all, the Americans and other contenders won't just be poodle faking in Afghanistan. There's too much at stake out there for all concerned.
> Therefore, with the LeT and its affiliated groups being diverted to Afghanistan by Pakistan to help the Taliban to achieve its goal, Kashmir will be off their radar. Afghanistan is more important to Pakistan than Kashmir.
In a nutshell, there would be no escalation of terrorist activities in the Kashmir Valley after the 'withdrawal' of US troops. In fact the violence would probably come down several notches as the LeT and Co will be busy trying to help Pakistan achieve more important goals in Afghanistan.