The other point of protest and felt insulting was that Pakistan was created mostly cause of vote of the bengali people in favor. Otherwise it wont be possible. The 1st idea of a separate muslim country was given by bengali itself in 1906 and muslim league was also formed in Dhaka university at that time and on top it the separation of Pakistan document was submitted by a Bengali also n I think you know him sher e bengal A Q Fazlul haque. Hope that may help.