Ideologically, BJP is closer to Congress than the Leftists. Although BJP may be opposing the deal, this is in line with the policies adopted by BJP while they were running the government. On the economic front as well, there is not much difference between the ideologies of the 2 parties. It would be of great benefit to the country if the BJP could forget its differences with the Congress at least at this instance so that the Nuclear deal can be approved by the parliament.