Go to your nearest university and ask a professor of history about this. You will find that the Bible and the Quran are not regarded as historical texts or primary sources. They are evidence of a mythic tradition, not of the contents of that tradition. Put another way, they are evidence that people at the time of writing had stories about Moses, not evidence of any details of Moses's life. As for the Bible and the Torah, those are the same thing in this context, not two different works. And the Quran was written after, using the Bible as a source. That's not evidence of anything in particular.
There are plenty of primary source documents about the life and career of George Washington. We don't have to rely on later stories about him that come from oral tradition. We can also visit his house, look at his possessions, see portraits that were painted of him while he lived, read things he himself wrote in his own hand. It would take a conspiracy of supernatural proportions to fake the life of George Washington. Moses, on the other hand, is a character in an oral tradition that later was written down, the same as Aeneas, Cadmus, Heracles, et al. There are plenty of pieces of literature detailing the lives and accomplishments of those characters too.
Do you therefore accept that Aeneas was the son of the goddess Venus and that Jupiter, the king of gods and men, sent him to found a colony in Italy that would one day give birth to Rome? Do you accept that Cadmus traveled from Tyre to Boeotia in search of his sister Europa, whom the god Zeus had abducted, and there founded the city of Thebes after slaying a dragon? Do you accept the many feats of Heracles, son of Zeus, and recognize as legitimate the claims of many ancient Greek kings, that they were descended from him? In fact Heracles is much better attested than Moses, all things considered. But he's still a mythic figure. History is all about standards of evidence, and none of these guys meets them.
