QUOTE(C. Zhu @ Nov 1 2006, 11:31 AM)

http://en.wikipedia.org/wiki/Hinduism_in_BangladeshSince the rise of more explicitly Islamist political formations in Bangladesh during the 1990s,
many Hindus have been intimidated or attacked, and fairly substantial numbers are leaving the country.
In Bangladesh region, the Hindus became a minority in mid-ninteenth century, in
1941 the Hindus formed about 28% of the population, which declined to 22.05% in 1950. Since then, it has dropped by about half. Through a combination of mass exodus and
genocide in 1971, this represents a loss of around 20 million Bangladeshi Hindus and their direct heirs, and reflects one of the largest displacements of population based on ethnic or religious identity in recent history. A significant driver of Hindu emigration has been the
Enemy Property Act, later renamed as the Vested Property Act, through which the Bangladesh Government has been able to appropriate the property of around 40% of the existing Bangladeshi Hindu population (according to Dr Abul Barkat of Dhaka University).
1941- the Hindus formed about 28% of the population
1991- Hindus covering about 10.5% of the population as of 1991 censusislam is piss, oops, i mean peace.

In 1941, Bangladesh was still part of India, hence why it had a larger Hindu population at the time. The Partition of India in 1947 led to the creation of the Republic of India and Pakistan (which included Bangladesh), and the mass migration of Muslims to Pakistan and Hindus to India. Later during the Bangladesh Liberation War against Pakistan in 1971, Bengali Muslims were also attacked by the Pakistani military according to that same article:
QUOTE
Bangladesh Liberation and Genocide (1971)
The Bangladesh Liberation War resulted in one of the largest genocides of the 20th Century. While estimates of the number of casulaties vary between 300,000 and 3,000,000, it is reasonably certain that Hindus bore a disproportionate brunt of the Pakistan Army's onslaught against the Bengali population of what was East Pakistan.
Ethnic tension played a far greater role in that war (religious issues were secondary factors). Shortly after, the country was ruled by a military dictatorship. The Vested Property Act was used to try prevent people from leaving the country, by ceasing their property if they left. Democracy was later restored in the 1990s, and since then, the government has been working towards reducing corruption and has also employed many minorities to work for the government. Like I said before, the current Bangladeshi government does not support any kind of oppression against minorities.