Oh..and another thing... The books of the old testament were written over a long period of time, and copies of the book were scattered by nomadic tribes and priest accross the mid east region, africa and parts of Europe. Let try to think about those things for a minute:
I imagine a group of people travelling around the globe trying to collect all of those books and change their content...now how much sense does that make? Are we talking about a worlwide conspiracy here? Which is harder to do...change a few hundred (thousand book) accross the world.
Let's just admit for a minute that the conspiracy was true. At what point did it occur? Before Christ? In which case, the jews had the foresight to leave everything in there concerning Christ (Which by the way they did not recognize) but remove everything that concern Mohamed??? Please let's be serious here. Okay, let's move on and assume that they were changed after Christ...Wouldn't the Jews who did not recognize Christ and until this day did not convert to Christianity say something?
Thanks to the dead sea scrolls, we know that if the books were altered, they were altered before (At least 100 years) christ, which leaves us with the worldwide conspiracy theory. Now, i believe that we all have a brain here....HOW IN THE WORLD IS THAT POSSIBLE?? People, please understand that teh Bible is a collection of Books that were written in different periods of times, it was not "given" to one man.
I ask you: Which one is easier: For one man to change one book or for 1000 to change several books and agree upon what should be in it? You do the math.
I believe it is more likely for Mohamed to have been misguided...(that is why he should have checked with the people of the book as he was intructed to do).