What if there are multiple exits out of a burning building? What if a person is already close to an exit? Would you threaten him to come towards your exit or else!! There..that is a more appropriate analogy
(PS: I disagree that Hindus would consider Prophet Mohammed to be a way to God. With his message of violence, rape and banditry, Mohammed is a certain path to hell)
Threaten?
If you truly believe there is only one way out, what sense does it make to remain silent? By remaining silent, you are complicit in their deaths. Even if you call out and no one comes, you have done what you could.
Using compulsion to convert is ridiculous. You cannot force people to believe.