This is propaganda from the fascist ruling party BJP/RSS. After the Bihar SIR exercise, not even a single illegal immigrant was found. All this talk of illegal immigrants is classic anti muslim dog whistle.
BS. I grew up in Delhi. We used to have a large open space where I and neighborhood kids used to play cricket . Eventually the whole area converted to slums with people from Bangladesh. They took over the whole area. I was too young to care about ethnicity but the loss of my cricket field still bothers me. My neighbor was a bank manager and he once said that the government politicians forced him to give "loans" to Bangladeshi people , with no documents and only their thumbprint,before elections to those people to ensure victory of the ruling party.
What does any of this have to do with voter registrations?