Most of it is just propoganda. The economic and social condition of the median Muslim in India and Bangladesh is better than the median Muslim in Pakistan . I don't know what you mean by " Muslim power" but what good is it if people are struggling to meet their daily needs. Bangladesh, which was way behind West Pakistan in 1971, wisely chose to become a secular state and is today ahead of Pakistan in HDI indicators, whereas Pakistan is a failed state.
Islam is certainly not in any danger in India. The percentage of Muslims in the population has gone up from under 10% in 1950 to almost 15% today. Just compare that to what happened to the minority population of Pakistan. If partitioned India had four Muslim Presidents, imagine the political power the Muslims would have weilded in a united India where they would have had close to 40% of the population today. Anyway, it was probably for the best for India as we managed to avoid the hotbed of Islamic fundamentalism, but the big loser from the partition was Islamic power and the Muslims of the subcontinent. From being the rulers of the subcontinent, all the Muslims got was a moth-eaten West Pakistani wing. They lost even Kashmir and some of the Muslim districts of Punjab.