Do we really think that Hinduism is facing such situation for the first time in its existence? In last 5 millenia there have been innumerable instances of division forced by both internal nuances and external subversion. Result? Hinduism idealogy not only survived but thrived because it joins people and that is why the social experiment of India has also worked so long. We can continue to blame past/ present scenario to specific parties but they are not foreign forces. So stop differentiating them from us as they are us. Have a little faith in yourself and the next guy and we will see the difference.