Hi. I've reverted your edit to Qur'an Only Islam - Why it is Not Possible because it is faulty and makes no sense at all. In you edit summary, you agree that "Buddhism without the Buddha would be like Islam without Mohammed, or maybe even Allah", yet you proceed to remove that comparison (i.e. the comparison of Buddha's input to that of the Hadith and Sunnah which in essence ARE Muhammad) with "Islam without the Hadith and Sunnah of Muhammad is like Buddhism without the Sangha".
According to Wikipedia, "Sangha is a word in Pali and Sanskrit meaning "association", "assembly," "company" or "community" and most commonly refers in Buddhism to the monastic community of ordained Buddhist monks or nuns." So how can you possibly think comparing Muhammad's role in Islam to that of a monk or nun in Buddhism is accurate? Monks/nuns in both Buddhism and Christianity are loosely comparable to imams/shaykhs (although more closer to priests, there is nothing more appropriate in mainstream Islam).
Same with Jesus who is comparable to both Buddha and Muhammad. Yet you replaced him with Paul. If you took Paul out of Christianity, it would still exist. In fact, Christianity existed from the beginning without Paul's input and there are Christians today who disregard Paul's input. If you took Jesus/the Christ out of Christianity then it would not exist just as Islam would not exist without Muhammad/the final Messenger.