100%? ...... 10 Million of your refugees(I quote from Mark Cutts Book) were Hindu's? That would mean the complete Hindu population left BD and you should not be having any hindu population left in your country.
Do you have any historical data to back your claims? Awaiting your comments.
10 million or 9 million is not the issue. Issue is almost none of these Hindus fought as Mukti. The reason could be they were expecting a Hindu India to accept them permanently.