Bhutto was nothing except an ambitious person who after 'illegally' becoming the Prime Minister of Pakistan (that he did not deserve) wished to be the leader of Islamic world. He had only one skill which was eloquence wrapped with deceitfulness. You say he fought the case of ummah but within his own country he dealt with opposition like a communist psycho.
How can he be a leader when he facilitated the breakup of this country? He was responsible for convincing stupid generals to go to war to India in 1965, and when the results were negative he distanced himself from his daddie Ayoub.
He, the deceitful Bhutto opposed Ayoub when he was no more the Commander in Chief, and now Bhutto was obeying Commanders like Yahya in toppling Ayoub's regime.