Indeed that it’s an easy job to add or remove passages the NT if there are no authorities to keep them intact and there are no societies that used it and can always and had always compared the new copies to the old copies. But contrary, you have to remember that we have witnesses, societies, authorities and books that recorded all those books from generations to generations, and if we are an honest person, we have to admit that all those records and all the tedious jobs of the scholars to investigates the originality of the bible, have all come to the conclusion that we do have done a great job of maintaining the bible. Why you come to different direction of conclusion is an amazing thing to me?
While all those studies can bring clear minds to the conclusions that the Bible has been reserved well, you on the other hand wanted so bad to think differently. What bible do we have today? Conclusively by those studies, is the same bible as the original one, not the one that is missing a passage? Don’t you get it?
As for reciting, I believe it’s all fall to the tendency of human err. None has ever been a witness of how the Koran been collected and none can ever claim that it’s original. As you repeating the old adage that it’s all preserved well, in fact you don’t have the witness as explicit as a written recorded book that is passed from one generation to the next. Look at the problems that other posts have stated to you, even Muhammad didn’t remember the surah! You said millions have memorized that, where are all those millions that have passed away? Can you take them as your witness? You can’t. So, you keep repeating those magic words that “it’s preserved well”.
Your argument is the one that is standing on a very thin ice.