1. Bengalis (well Bangladeshis) are generally quiet, simple, humble people not given to confrontation. If an Indian went to Dhaka he wouldn't experience any problems and you can ask any member here about their experiences in Bangladesh.
There is no hatred of Indians on a personal level.
2. Given that Bengalis are Muslim in the diaspora they mix with Pakistanis in mosques and elsewhere and many feel an affinity with their co-religionists and see 71 as a political issue or historical, nothing to do with actual Pakistanis they meet.
However Pakistanis definitely have far more hatred of Indians and Hindus and part of it though they may deny it is racial which is why they also hate more Indic Mohajirs and Bengalis.
3. As for politics.
The BNP/Jamaat nexus are puppets of Pakistan and Jamaat is full of guys like this Rock71 for whom hurting India is more important than improving Bangladesh. There is a belief in some quarters in Bangladesh that the Jamaat- BNP relationship is akin to the one rumoured to be between Israel and America i.e. the belief some have that Israel controls America through the Jewish lobby. According to this line of thinking Jamaat have huge power disproportionate to their numbers due to their foreign (mainly Pakistani backing) and infiltration of the BNP.
If I were an Indian I would be very wary of the BNP ever regaining power because it seems to me they are very unintelligent and greedy people, who lack the brains to realize a good, co-operative relationship with India is in our interests.
The Awami League are pro-India as everyone knows.
As for me as a nationalist Bangladeshi, who is a practicing Muslim but politically aware this is my personal opinion:
Bangladesh is a poor country with 160 million mouths to feed. Our priority is economic development and that naturally necessitates a good co-operative relationship with our biggest and most important neighbour India. Many countries would die to be immediate neighbours with what is the fastest growing economy in the world and a market bigger than the EU, so we need to utilize it.
Indians are rational people (unlike military ruled Punjabi chauvinist Pakistan) who can be reasoned with and we have sorted many bi-lateral disputes out. Those like Rocky71 who seek hatred and conflict between India and Bangladesh are working for the Pakistani agenda, a Pakistan which could care less about Bangladeshis as a people, and our national struggle to uplift ourselves from poverty, but is merely engaged in a phallic struggle for superiority with India.
On a cultural level, I believe Bengalis are an Indic people and need to be comfortable with that and understand that the Indic civilization which we are part of is a very deep and rich one giving the world Yoga, medicine, great cuisine, philosophy etc. There is an unwritten racial hierarchy in the Muslim world where west Asians (Arabs, Iranians, Turks) are at the top, Pakistanis are at the top or second tier...and Bengalis are below. The Muslim countries often have a natural inclination to support Pakistan over Bangladesh on any issue even when we're clearly in the right, hence the whole concept of Ummah becomes problematic Pakistanis are seen as "more Muslim" than darker Bengalis. Thus because of who we are racially we have to embrace that and embrace our Indic identity as a subset of our more important Bangladeshi identity.
The outside world will always see us a brown Indic peoples as "the same" including racist Punjabis of Pakistan, so in that case why should we fight?
Most people in the world are very shallow and image-based, thus I am of the opinion now that if India is seen as successful it's good for Bangladesh e.g. if brown desi man are seen producing and selling Tata vehicles it's good for Bangladeshis who are just "brown desi men" too for outsiders.
I have not articulated my thoughts on this well at all especially the part of being "2nd class Muslims" thus necessitating being comfortable with our Indic identity, but I hope this post helps in some way.