I would also add, that some things are not done by choice, but by virtue of your history and experiences.
We being in the west, and closer to the wider Islamic community, and closer to the heartland that produced great thinkers in Islamic history, gave us different experiences, and a different perspective.
Bangladesh being a Muslim majority region, and surrounded by non-Muslim cultures was surely to have a different perspective, plus because it was and is a uniformly a Bengali area, it could hold onto a single calling of a Bengali culture and Bengali language. Which played a part in the decisions they have made. Some among us misunderstand their intentions, due to that history.
But, I would warn anyone who questions their love of Islam, which I've learnt some here hint towards, a very wrong conclusion. They feel the brotherhood with Pakistanis, a lot more then Pakistanis realise, It is an important point, that needs to be told. But, the fact is the wounds of 1971 are still fresh among some Bengalis, so, some things will take time. Only difference is, we have chosen to move on and somehow dealt with our pain quietly, they as yet, have not.
The situation in my opinion isn't so simple, the above is my interpretation. Whatever the actual reality, there is one thing of which I am certain, If I had to choose non-Pakistani communities to cover my back, as if my life depended on it, Bengalis would be near the top of that list, not the government, the people. I am certain time will prove me right.