The border in question wasn't even a border in 1938 because that predates the partition of India. Bangladesh, the country that certain Indian political factions

The border in question wasn't even a border in 1938 because that predates the partition of India. Bangladesh, the country that certain Indian political factions are claiming these people are from, only came into existence in 1972 and mainly just recognises people who were permanent residents there in 1971 as citizens.