BNP need to be reorganized. Secularism is not same as undermining Islam. It simply means that we keep religion, politics and govt. separate, the separation of church and state as they say in the US.
That said it all depends on democratic will of the people, how they want see their govt., constitution, law etc. When they make mistakes, people learn and correct their mistake. That is democracy. So role of Islam really depends on people's will.
If BNP, as an internally democratic institution, decides to become a more secular political party, then if it is against the wish and taste of some people who want to see more Islamic leaning in their political party, they can go vote for Jamaat and elect their representatives.
As for Luffy 500's other comments about Hindu's being more aligned with India, yes I am aware of this fact, how could any Bangladeshi not know that. Anytime a Hindu makes some money, instead of making a house in Dhaka, many prefer to build their house or buy their apartment in Kolkata. We cannot avoid these migrations, it is human nature, people make long term decisions based on security although they may remain in Bangladesh to make money. This is how the Hindu percentage has been reducing since 1947.
But we still have a huge Hindu population 14-18 million. Most of them and their future generations will remain in Bangladesh. We cannot afford to alienate and not utilize the talent of this population. If BNP is a true national party, representing all segments of Bangladesh population, then it should not exclude or ignore the Hindu population. Simply put, if Bangladesh does well economically, Hindu's in Bangladesh will also do well, but if Bangladesh suffers, Hindu's will also suffer. So except for the one's that are in the process of migrating to India or other countries, there is no reason to think that Hindu's should not support Bangladesh national interest, as it is also in their own personal interest to support Bangladesh national interest. Indian agents in Bangladesh can be from any religion, they provide a service and get paid for it, their main identity is that they are traitors to their nation.