The ruling and seemingly most popular party in India right now is BJP. The premise of BJP is that of Hindu nationalism but I don't understand how such a thing as Hindu nationalism can ever replace the pre-existing Nehruvian secularism.
The reason I say that is, the idea of Hindu as a person with a set of X practices is illdefined. There are actually various sects and castes of Hinduism and in each they have different gods and different practices. These go as far as marital law, food choices etc.
Provisions to remedy the differences which arise to this and also historical mistreatment of certain caste already exist as Caste reservation, non uniform civil code etc. So, what more is BJP offering than what there is already?