Brother, this is not a Bangla-Pak thing. I know there are some hyper-nationalistic Pakistanis out there speaking about superior races and stuff like that. This is not my cup of tea. I am Muslim first and I want that Pakistan and Bangladesh become unified again.
And I also know that most Bangladeshis have no problem with Pakistan and Pakistanis in general. They intermarry, are friends with each other and abroad they are happy too meet each other because there are still cultural similiarties (with the common religion of course). Every Bangladeshi I know can speak Urdu. So there is no enmity.
Bangladesh is still defined by its Islamic heritage and Bangladeshis are proud Muslims who cannot stand the fact that they are dominitated by Hindus (I know that, you know that). I just try to become a counterweight to those Bangladeshis who think that becoming Hindu slaves and sh....ng on Pakistan makes them somehow superior. That's not the case.
Have a nice day.