Perry,
If Jesus really lived, then problems are more because it would mean the subject of what is called redemption by the death of the Son of God originated from God. Without any conditioning, anyone would revolt at the recollection of what he reads in the Bible that it was making God Almighty act like a passionate man who killed his son when he could not revenge himself in any other way. I am sure a man who did such a thing would be hanged.
God is too good to do such an action, and also too almighty to be under any necessity of doing it. Any system of religion that has anything in it that shocks the mind of a child, cannot be a true system. But the Biblical concept of God the Father putting his son to death, or employing/permitting people to do it, cannot be told by a parent to a child with conviction; and to tell him that it was done to make mankind better is making the story still worse—as if something greater would be achieved through the murder of the innocent [a logic today’s terrorists resort to]; and to tell our children that all this is a mystery is only making an excuse for the incredibility of it.
Account of Adam and Eve is contradictory to the original creation account given in Genesis 1 where we find God creating mankind, not just a couple. Even if first couple sinned their sin would not be passed on to their children: "Fathers shall not be put to death for their sons, nor shall sons be put to death for their fathers; everyone shall be put to death for his own sin.” (Deuteronomy 24:16)
Hence if at all Jesus did come, that might not have been to perform miracles or to perform sacrifice "to take away the sins of the world." He might have lived like a great prophet, preached very elevated teaching such as Mathew 5:44-48 and disappeared only to appear as a mighty teacher again somewhere on earth as prophet Elijah reappeared as John the Baptist. (Mathew 11:14)