Bengali Muslims supported Jinnah in 1947 because they thought that their biggest oppressors and enemies were the Bengali Hindus. And they got partition in 1947 and then they thought that all their poverty will vanish after that.
What happened after that was nothing but horror... the Numerically large Bengali Muslims found themselves being ruled by Urdu Speaking Punjabis, from a distance of 2000 kilometers. It took 25 years of brutal struggle and millions of dead and also Indian Army for the Bengali Muslims to get their own nation...
Read in detail about the history of Bangladesh in Internet or through books. You will understand that societies are complex - just by removing one caste or group, a country will not get rich or prosperous. Periyarists fail to realise this basic fact
