Here comes zaid hamid chamcha......jamiat-e-uelma islam had solid reasons for opposing "partitioning of muslims"........your jinnah baba chose an easy way and left 3 crores minority muslims at the mercy of hindus........JUI had islam in mind, while jinnah baba eyes were on throne of governor general of new country
And today there are 18 crore muslims living with hindus and sikhs and others in India. So the "mercy of hindus" as you put it wasn't such a bad thing for them.
(BTW nobody is at anybody's mercy in India, they are all equal citizens irrespective of their faith.)