Well, we are talking about a government that declared 95% currency in circulation as invalid to nullify “black money” and rationed out currency for months. Currently they are doing an electoral list validation by asking everyone to submit a form so they can keep their voting rights. The policies are made with a strong “ruler” attitude.
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.
The SIR has been carried out historically many times in India. In the recent years a lot of Bangladeshi illegal immigrants (who ironically hate India) have registered as voters. A lot of political parties have changed policies to cater to these illegals. So this was due for a long time.