Man, all of the above ain't even necessary.
It is written: For all have sinned, and come short of the glory of God. Is that so hard to understand?
1 Corinthians 15:22 For as in Adam all die, even so in Christ shall all be made alive.
Romans 5:19 "For as by one man's disobedience many were made sinners, so by the obedience of one shall many be made righteous."
This is called imputed sin, we all received the sinful nature passed on from Adam, so it is impossible that one is sinless besides Jesus who was born of a virgin. So lets cut the crap about how Mohammad was sinless.
Case closed.