I hope you know the meaning of the word. Anyway if the government actually has the majority it claims it has, then how does it matter whether BJP supports or opposes the deal?
Say it supports the deal, and Congress goes ahead, but Left pulls out the support to government, do you suppose BJP will vote FOR Congress when it comes to no-confidence motion?... Do you think they are mad? Whatever do you require the opposition party for, in the Parliament? Then let us all admit that this is a coalition government between BJP and Congress, and let the Left take the role of opposition...