I have no doubt is was all made up. For any one person to have all of those godly attributes is beyond belief and that, I feel, is why there is no reports of this Jesus from birth to age 30. The imaginers just could not come up with a child, then young adult, who was perfect in word and deed. Also, wasn't the age expectancy about 30 or less then? I agree it was just an amalgam of previous stories.
What amazes me is the wholesale admittance by Christians that this made-up figure rules their lives. Never have so many been so wrong.