Where did you get the message that "MOHAMMED" (pbuh) dreamt of changing the whole world population to be muslims.
Getting a straight path is in the hands of Almighty. Even Prophet Muhammed (PBUH) could not convert his own uncle a muslim and he is admonished that even if Muhammed (PBUH) wishes to change one to become muslim, without Almighty's will, he CANN'T DO. Then, how could he have hoped or dreamt of changing the enire world to be muslims.
Don't spread wrong messages which spoils even the good-hearted and moderate hindus and christians as well.