For decades, a mostly Muslim Bangladeshi population has flooded into India's northeast state of Assam to escape poverty, often without proper documentation. But a recent move to crack down on illegal immigration has excluded nearly 2 million people in Assam from the newly edited National Register of Citizens, effectively rendering them stateless. Now, with an undercurrent of anti-Muslim sentiment in India, many fear that India's Hindu Nationalist leadership may begin to implement similar measures across the country. Hari Sreenivasan reports.