So question about the historical Meccan Muhammad do bother me a bit..
I plan to go through the link you provided when I get a chance to, but in the meantime, can you give us a summary of your conclusions? Are you saying you don't believe there ever existed a man named Muhammad, the town that he lived in didn't exist, that individuals from different areas who went out to "interview" witnesses, along with the witnesses themselves, all were fictitious?
And then, if your belief is true, what does that mean?