They are Indians you silly Lungi, of course they have great affection for themselves. On the other hand, they hate illegal Bangladeshi pole vaulters. And no thanks, lungi and underwear manufacturing , jute farming based Bangladeshi economy won't be a perfect match for the North East.
NE has plenty of electricity generation capacity and potential to export agricultural products.
BD's growing economy needs both electricity and agricultural products. BDs market is very close to NE states and so trade will be quick and efficient.
Also, BD can provide the NE with medicine and consumer goods and easy access via its ports to trade with the outside world.
Get it now genius?