Are you kidding me?
They tried their level best not to accept Kasab as their citizen until it became impossible. It was one month before they accepted it.
All the planning for 26/11 happened in Pakistan, all the key conspirators are in Pakistan. Yet have you seen them conducting any inquiry into the incidence and finding about the information that India did not find?
In 4 years they have not provided the voice samples yet, is it so hard?
India only has a pawn and they have the mastermind, they are 5 times better placed to uncover details of 26/11 that India cannot do without their help. Yet what have they contributed?
It clearly shows that they have no will to uncover 26/11 and there can be only two reasons.
1) Either the state was involved in it and hence they are doing what they should be doing, protecting their state actors who they call non state actors only because of fear of the world.
2) They are not involved but fully support terrorist organisation that operates against India, hence trying their level best to protect them.
Pick whichever you want.