Muslims have their own ' manuscripts, archaeology, fulfilled prophecy and statistics' as evidence. I'd advise not arguing with them about it for the reasons you mentioned. Plus they cite faith, which you didn't.
At any rate, can you prove beyond any doubt whatsoever that Mohammed was not the prophet the Muslims say he is and that what he wrote is not the Word Of Allah?
Muslims have their own ' manuscripts, archaeology, fulfilled prophecy and statistics' as evidence. Precisely.
It's a fool's argument to get into the dispute over which scripture is the scripture: no matter which you follow, you are a heretic in the eyes of everyone else. As Abraham Lincoln famously noted (memorandum of 30 September 1862),
"in great contests, each party claims to act in accordance with the will of God. Both may be, and one must be wrong.
We are all somebody's blasphemers and heretics, so why worry about the charge, it's silly nonsense.