You do realize that the Rwandan genocide, which is a well recorded and well investigated event, had a similar death rate per day as East Pakistan of 1971. That rate was achieved by a rag tag militia as opposed to an organized military of Pakistan.
Why are you making a parallel of Rwandan civil war with BD independence war? The situation is completely different from each other. Two groups of Rwandan people live in the same areas or in the same villages. There it was a direct civil war whereby each group killed the other directly. In case of Bd, it was different.
The army persecuted mostly the known sympathizers of AL and was shown ways by the razakars. So, it was basically a killing of targets and not of masses. Mass killings were done on the night of 26 march in Dhaka and then, by a mistake, in Jinjira a few days later. Please do not confuse truth with fiction or wartime propaganda of India's mass media in 1971.
Also, note that every war is unique and different. The facts should be sought out from the true information only from the actual sufferers. No parallel can be made of any two wars. However, I must admit there were murders and rapes and other atrocities. But, the scale was certainly not that big as it can be seen in the Indian mass media reportings of those days.
The reportings, certainly, brought about a positive response from the world community in favour of Bangali independence from Pakistan.