To your question of religion based immigration, this ignores crucial background - After the Partition in 1947, there were Hindus and other minorities who remained in Pakistan(including current Bangladesh) and Muslims in India. There was the Nehru-Liaquat pact which curtailed further exchange of population provided the minorities were safeguarded.
This agreement was drastically violated, especially in the 1971 war when Pakistan Army deliberately targeted Hindus.
This lead to a mass exodus of Bangladeshi Hindus to India. In fact, the Communist Party, advocated for their citizenship status much before Modi came to power.
There has been further persecution of Hindus, both in Pakistan and Bangladesh
This agreement was drastically violated, especially in the 1971 war when Pakistan Army deliberately targeted Hindus.
This site run by Muslim Bangladeshis documents some details http://www.genocidebangladesh.org/
This lead to a mass exodus of Bangladeshi Hindus to India. In fact, the Communist Party, advocated for their citizenship status much before Modi came to power.
There has been further persecution of Hindus, both in Pakistan and Bangladesh
https://foreignpolicyblogs.com/2018/06/05/bangladeshi-profes...
Also, regarding Myanmar, note that this act also doesnt give refugee status to Hindus who are also being persecuted in Myanmar. https://www.amnesty.org/en/latest/news/2018/05/myanmar-new-e...