A common man needs a very strong reason to uproot his life, leave his family and go to foreign country towards certain death.
Reason dictates that he will first blame his troubles on his govt for getting into a war with a much larger nation. You will have riots and revolts in your country before Indians will have insurgency in theirs.
Plus if insurgency is the only problem it can always minimized by deploying troops on the border(which they will already be)..shooting everyone trying to cross...take LOC for example.
It has been three decades since Pakistan(and they have much more resources than you) been trying to bring India to its knees with tactics like insurgency.Yet India has not yielded an inch.
Does Bangladesh have resources to last three decades absent foreign trade? How long before every system in your country breaks down.If you still have a functioning govt in your country after couple of weeks of blockade, either you will declare a full scale war on India(which you will loose) or you will stand down.
That is an epic post:
"insurgency is the only problem it can always minimized by deploying troops...take LOC for example"
That is why india ran to US and always in ISI phobia. Add Bangladesh into helping NE independence aspiration; india will be kaput financially, emotionally and otherwise.
india will never know how Bangladesh operates in the mist of chaos. Poor thing.