BJP will do this first thing to seal the deal when come to power. They are frustated that why they could not do it in their tenure. So they have been looking for opportunity to down the govt and take credit with them. Advani openly favors the deal but can support it because Congress will take credit. He just excuse that its not acceptable in current form that India looses the right to nuke test. Who can stop India to do nuke test as a sovereign country. BJP them selves conducted test w/o and took world criticism so why cant any govt do it again. Just because of a deal we can loose our security and right to conduct nuke test. Advani knows it. If he supports cong who will ask him opposition leader.