BJP's stand is very clear. They want a debate in the parliament instead of pushing it thru. They do not like the idea of india giving up the testing of the nuclear weapons.
Only time, US saw tough talkers from India was during BJP rule. Go and read the admiration of Armitage for Jaswant singh. They will talk tough and make sure that the India's testing will not affect the supply of nuclear fuel to India and this point is there in the deal.
