In my opinion Pakistan is well aware of the fact that they will never be able to get the similar deal from US as we did.
They are doing to create a pressure on US by demanding for the same treatment so that they could continue their nuclear development activities with overt and covert support of China.
They are also want to exert counter-pressure on US, which is pressurizing Pakistan for not signing a deal with Iran for laying Iran-Pakistan gas pipeline.
If US rejects Pakistan's request for treating it at par with India with regards to nuclear cooperation, Pakistan can also reject US pressure against the gas pipeline.
For Pakistan, this gas pipeline will bring unbelievable economic prospects. They will earn millions of dollars if India also joins in.
Pakistan wants India to join this project at all cost. Why? Reason is simple. If we stop their water (which we will never do) they will stop our energy resources.
Either we sign a deal or start energy projects with US or Iran-Pakistan, we may find ourselves being blackmailed from our so called friends or foes.
