By December 2019, the B.J.P. had passed a nationwide law to get around this problem — the Citizenship Amendment Act. The C.A.A. would allow Hindu, Christian, Jain, Buddhist, Sikh and Parsi migrants from Afghanistan, Pakistan and Bangladesh to claim Indian citizenship and, in theory, allow Bengali Hindus excluded from the N.R.C. to apply for citizenship too. Pointedly, the only major religious group in the region excluded by the C.A.A. were Muslims.