BJP doesn't want the govt to fall next week. Its afraid that, if the govt were to fall now, Congress will turn the upcoming election into a referendum on the nuclear deal. BJP instead wants to fight the elections on the amazing ineptitude and non-governance of this UPA dispensation. This over-the-top strategizing is unwarranted.
BJP should be honest and stand by its (correct) assessment that Manmohan Singh has screwed up spectacularly in the 123 negotiations. Manmohan's selfish, legacy seeking haste in pushing through the deal will cause irreparable damage to our national interests. The only way Manmohan can be stopped in his nefarious designs is by unseating him. Nothing less is acceptable.
So here's an idea. Go flat out against Manmohan and bring his government down. Modi and Yeddyurappa can easily account for about a dozen Congress MPs pressing the wrong button next week. Once Manmohan has been defeated, he should also be prevented from remaining as care-taker prime minister. Otherwise he would gleefully sell his country to the other lame-duck govt in Washington.
BJP should announce outside support for a caretaker government (led by say Kuldip Nayyar) which will be acceptable to the Left/UNPA Parties as well. Have that government dissolve Parliament immediately, paving way for elections in October along with the five assembly polls.
And BJP (if it wins) can ofcourse negotiate a much more meaningful agreement with Barack Obama next summer.