well, not only bhuttos, lots of others like cheemas, bhatts, rana etc were hindus. But question is, are mughal invaders totally responsible for this ? it takes two to clap. our indians were always fighting. they still do. there is no unity among them. so even british took advantage. history is filled with so much stories with few hundred mughal invaders or few hundred white skinned fooled us and ruled over us. this is nothing new. if not for the some resistance by sikhs, india would have had different name and state. look at west and arab, they are successful not because they are better but they are united.