Quran and Hadiths

[muhtesem insan]

Then I'll gladly accept historical references to him from 600-632 AD but I already know you don't have any of those eithe because no one else does.

The legend of William Tell is a myth too. It started much later than mohammad and is still nothing but bullshit.

AFAIK arabs (in that age) were still nomadics tribes and our knowledge of that era mostly based on oral tradition. But still there are some non-islamic sources dating back to 7th century only decades after his death.
History does not always provide detailed hard copied sources but fragmented pieces. Muhammad's authenticty is not an ongoing debate amongst historians.