When India was divided, prime minsters of India and Pakistan [Liaquat–Nehru Pact] agreed on treating their respective minorities well. Without this agreement the minorities[Hindus, Sikhs etc in Pakistan] living in each country could have choose to move to the other[India in this case].
Hence passing CAA is just accepting the fact that Indias neighbors are not treating minorities well as they promised and delivering the promise that was made during independence.
Hence passing CAA is just accepting the fact that Indias neighbors are not treating minorities well as they promised and delivering the promise that was made during independence.