Once upon a time in a big family (the world), a senior member of the family (USA) bought a bike to a very sincere, hard working elder son aged 22 (India). Immediately the next day, the youngest kid in the house aged 6 (Pakistan) goes and cries to the same elder person (USA) that he too wants a bike.
Imagine the situation of the elder person. He tries hard to explain the kid that all he needs right now is a small cycles with supports so that he learns to ride a bike when he becomes 20 years old.
But can the 6-year old kid understand? NO! He will keep crying for days.
Similarly USA is trying to make pakistan understand that the Nuke deal is required for India due to its high growing energy needs (due to economic boom). Pakistan should understand that Nuke deal is not a gift, rather there is a bad need for certain emerging superpowers.