Well open your mind abit, maybe you didn't know but not the whole world is Muslim.
He was a prophet but the quran as you Muslims normally state, was compiled after his death. Your scriptures are your reference to Muhammed. To me, he created a religion and was just a prophet. Also there were other prophets, dietes that have walked this earth-their followers claiming that theirs is the only truth, you are no different.
The clarification regarding Sikhi has been given-maybe if you care to open your eyes then you will see, I don't think you need to be spoon fed on everything.
All I sense is ego-filled views moss and going over the same issues like a broken record, if you believe that your religion is the only truth then please do carry on believing it- no one is going to take that away from you but no need to shove your religion in the faces of others. Good luck in your journey.
bhul chuk maaf