Normally regional cooperation is good...it should be above politics and what not...
...however it was India that started it's small minded tactics and pettiness to spite Pakistan. Namely making SAARC defunct and dragging cricket and other sports through the dirt of politics. What goes around comes around...most Pakistanis now feel that this pettiness should be returned in kind.
Im sure its not that black and white. When it comes to india and pakistan relationships, pettiness is a two-way street.
Not saying that pakistan should forget everything and start cooperating on everything, but a common threath like this where cooperation benefits both sides is a good start.