There were lot of reasons for BD people to revolt.I will not go further because it has been discussed extensively and will only lengthen the thread.But no one will come to conclusion.
There should not have been operation Searchlight.We did not take arms first but Pakistan Army did.But again lets not go into details.
No,BD people would not want to reunite with Pakistan.May be a few people on both the countries would want.We are better off alone.And this is best for both the countries.
India had plans to keep their army in BD for a longer time,and this was confessed by an Indian prime minister later on.I forgot his name.
About resources,Bangladesh can produce food for itself and also for West Bengal if taken care well.Two states self sufficient in food is more than any leader would have wanted.Moreover we have reserves of gas and high possibility of large reserve of oil in the Bay of Bengal.
If India were given the chance to control BD,they would have.It is natural.
Anti-India sentiment grew in Bangladesh for reasons like RAW's involvement with CHT insurgengts,Farrakka Barrage,BSF killings.This is my personal observation.