Naomi - You will never understand. Because you never try to. So here are (ONLY) few things for others to ponder.
1 - Christianity, Judaism came before Islam then why Muslims respect Moses (pbuh) and Jesus (pbuh)more than their (supposed to be ) real believers. Have you ever seen a Jew or Christian putting PBU (peace be upon him/them)?
2 - Muhammad could not read or write still he managed to copy things from previous books including Bible (OT & NT), Greek studies, and all of what was there before his time. He did not travel that much, Arabic Bible was not available until centuries after him; he did not have computer, USB sticks, and many more things. Still he managed to copy only what would be proved correct centuries after and left out illogical things. So perhaps you can try doing this in this age.
3 - He managed to write (or according to you copied) a book that is read and believed in by billions (whether you like it or not) still he did not write his name on it as an author and therefore did not claim any credit for it. Show me one person in modern history who would do that?
4 - In the book he (copied according to you) he talked about a woman (Marry or Mariyam) as chosen best among the all of the women in the world and he named a whole chapter in her name. Why did he not put his own mother's name there? And people who believe in that woman's son as son of god has her hardly mentioned in their book let alone naming a whole chapter to her. And then according to them Muhammad was an enemy (and still is) so why he gave that much respect to the mother of someone he is supposed to be the enemy of.
I can list many more but I know in the end few would say ( as an escape route) that they do not even believe in Bible so why waste time? And for you and few others nothing will ever make any difference. Because Allah told about few people in the very beginning of the Quran,
2:6 As to those who reject Faith, it is the same to them whether thou warn them or do not warn them; they will not believe.
2:7 Allah hath set a seal on their hearts and on their hearing, and on their eyes is a veil; great is the penalty they (incur).
And as usual, this is all I had to say on this thread, now you can say whatever as nothing will be that I wouldn't have heard before. And then of course you like your name on the last post on every thread so there you go.