1. There was no Kashmir issue in 1971. Terrorism and ethnic cleansing of Hindus started in kashmir in the late seventies or early eigthies .... people from mainland could easily go to kashmir on vacation until middle to late eighties.
2. that was the point of liberating bangla desh ... there was a mass exodus to India and Indira Gandhi even imposed a bangla tax via some special postal stamps to help bangla desh
3. Bangla deshies are not with pakistan at all. Ok, there are muslims there who feel the urge to attack Hindus. There may be an Al Queda operating in BD, there could be one in India too. But there is no proof that Bangla govt. or their intelligence is screweing with Indians .... they are not like pakistan or the ISI.