How can some people claim that Jesus never existed?

Jesus Christ is so firmly embedded into world history that no knowledgeable and educated person can conceivably question his historicity. The amount of material available about Jesus surpes the amount of material available to prove the existence of Plato, Aristotle, Alexander The Great, and other well-known figures of ancient history. There are several non-Christians and historians who wrote about his life outside of the Bible, including Josephus, Tacitus, Lucian of Samosata, Suetonius, Pliny the younger, Tertullian, Thallus, Mara Bar-Serapion, Justin Martyr, and the Jewish Talmuds. There are so many extra-biblical proofs for the historicity of Jesus that a person has to be either totally ignorant or totally biased to ignore or question the historicity of Jesus of Nazareth.