John Loftus' argument for a Historical Jesus
May be read here:
His argument that cults are generally founded by a single person, and that the most likely person to do this was Jesus is persuasive to me. I think it does establish a minimal case that there probably was a Jesus.
Secondly, do early church fathers like Ignatius and Polycarp believe in a historical Jesus? If so, would they have believed this if they had known the apostles and if this was contrary to the apostles' teaching?