The Hindu fundamentalist movement VHP organised the ceremony. The return to Hinduism is in reality motivated by the discrimination endured by Dalit Christians who are denied a number of development benefits.
I’ve read a few articles on this from what I can see the Dalit Christians where actually being persecuted by there own class. I’m not saying the Hindus may not be discriminating but everythig I’ve read says it’s the poor Dalits converting due to mistreatments from the Christian community.
Here a Christian site Link
This is some Hindu stuff on the situation Link