Bangladesh is vulnerable to India from All sides. Its almost surrounded on all sides (land) by India. The Bay of Bengal is infested with Indian Navy Eastern Command Ships like Shark infested water. And their only other Neighbour is not loving them either. Infact Myanmar - Bangladesh relationship is much worse then India-Bangladesh relationship. This situation leads to a lot of insecurity esp. in jamati bangladeshi who have a huge grudge against 'Hindu' India. And this is the main root cause for these tantrums from Bangladeshis trying to show themselves as all Macho on the outside to compensate for the insecurities on the inside. And there should be nothing surprising. If I was a Bangladeshi Rajakar/Jamati I will feel equally insecure.
Compared to Pakistan who are our enemy (i hope that changes) and they have genuine reason to be so esp because of 1971 (just imagine how much 1962 hurts us and compare that to 1971 and you will know what I am talking about), Bangladeshi's have no reason to hate us. Every neighbouring country has disputes. Even US - Mexico or US-Canada have disputes but people don't hate each other.
The only reason I can think of this behavior from Bangladeshi's (Jamatis et al.) is that they try to over compensation for this insecurity. Heck they can't really blame us if they and their politicians are so incompetent that RAW runs their country and their leaders needs to seek New Delhi's permission to form Govt.
Fool me once Shame on you. Fool me again and again Shame on me. Bangladeshis, you need some introspection. Peace!