It is not a square kilometer to move all people out of it and aquire the land.
Talk something feasible.
It was better that India helped BD getting independance.
Having Pakistan and China on two fronts would be a really big problem. At least Pakistan is not present on the east side now. That reduces some burden off the defence. BD is also a headache because of jihadi and terrorist activities against India from across the border. But it is still relatively better than what it is from pakistan