Find some other nation to help. Didn't you see how China gave up in Himalaya and begged for restoration of flight? Pakistani people are becoming pro India. Pakistani army is now incapacitated to make any impact in India. Try something else.
One cannot but see that all this current instability in Bangladesh (in the name of alleged accusation of "Hindu oppression") is caused by Indian BJP, taking advantage of the Bangladesh regime change. Attempting to destabilize neighbors is never a great idea for the long term.
The leadership in Bangladesh (and that of other countries) is quite capable to return the favor in NE India, I'd say many times worse than what India is doing - targeting Bangladesh. Bangladesh is a homogenous society (other than religious divisions) - India is not. Those fissures in Indian society can be easily taken advantage of by outsiders. But other than religion, India's cards in Bangladesh are severely limited.
I think the incumbent leadership in India should give up the Dadagiri dreams and come to a stable long-term, mutually beneficial relationship with Bangladesh. This is the only way forward for immediate neighbors and this is ground reality.
Mehnati and Tejarati (Working hard for business) should be the only goals for both countries.
Giving jobs to India's clamoring billions should be the primary directive for the BJP, which can pay off in scads politically - for BJP, far more than the bugaboo of "Muslim threat", the vote getting tactic used currently.
All the Godi media trickery cannot hide the horrible state of the Indian economy at present (which is even worse than Bangladesh - demonstrably so).
Indians need jobs and so do people in Bangladesh, to better their collective lives. Both nations should concentrate on that objective rather than the pointless geopolitical tomfoolery going on at present.
Sabre-rattling and threatening neighbors is always an immature policy, which does not pay well in the long-term, even for differently able countries. It is a spoiler of détente. The Chinese understand it very well, and look at where they are economically, compared to India.
Any misadventure in Bangladesh by Indian Army will be answered in kind. It will be quite costly for India. I'm sure BJP took note of this.
Also - there are countries bigger, stronger and far more capable than India defence-wise, and they also have far-reaching interests.