Why haven't you found them?
The pagan Roman historian Tacitus makes mention of the crucifixion of Jesus Christ at the hand of Pontius Pilate in Book XV, Chapter 44 of his Annals.
There's about as much evidence of Jesus existing as there is for Buddha or Muhammad. Even if, for the sake of argument, the person Jesus did not actually exist, there is very good reason to believe someone matching his description did. The religion did not simply spawn in a vacuum; they all drew their beliefs from someone.
The Pavement
The place where Jesus was tried before Pilate.
Once considered a myth because there was no record of it in Jewish or secular maps or history.
When Titus destroyed Jerusalem, he built barracks there. When these were abandoned and had crumbled, other buildings were built on top. Archaeologists had dug down to the barracks, but no further until recently. When they did go underneath, they found The Pavement.
People who hold your belief have been called “Jesus Mythers,” but this notion is widely rejected by scholarly historians.
Here is the opinion of several critical scholars who have rejected the miraculous elements of Christ's life:
"Of course the doubt as to whether Jesus really existed is unfounded and not worth refutation. No sane person can doubt that Jesus stands as founder behind the historical movement whose first distinct stage is represented by the oldest Palestinian community." (Rudolf Bultmann)
"To doubt the historical existence of Jesus at all … was reserved for an unrestrained, tendentious criticism of modern times into which it is not worthwhile to enter here." (Günther Bornkamm)
"I am of the opinion (and it is an opinion shared by every serious historian) that the theory [“that Jesus never lived, that he was a purely mythical figure”] is historically untenable." (Willi Marxsen)
Addendum
Saturating all of Scripture, there is a gospel theme that showcases the suffering, Resurrection, and glory of the promised Savior, Jesus Christ. He is the central object of our faith and the fulfillment of all that the faithful who have preceded us down through the ages had believed in.
Of course, the atheist wants to destroy, subjugate and cast doubt on any mention of Jesus. Some skeptics claim that the idea of the Resurrection was simply a legend that grew for several decades before being written down. 1 Corinthians 15:1–9 smashes this objection. Not only is five years much too short a time for such a legend to develop, but Paul cites a bunch of eyewitnesses “most of whom [were] still alive” (1 Corinthians 15:6, ESV). Essentially, he told the Corinthians, “Hey, if you don’t believe me, then go ask one of these guys.”
So are the appearances by Jesus truly “infallible proofs” of the Resurrection? According to Luke they were, and he wasn’t alone. Paul told the Greek philosophers who gathered in the Areopagus in Athens that God had “furnished proof to all men by raising [Jesus] from the dead” (Acts 17:31). “Proof” is from the Greek πίστιν (pistin) and refers to “a token offered as a guarantee of something promised.” It is a “proof” or “pledge.” Another lexicon defines it as “that which causes something to be known as verified or confirmed—‘evidence, proof, convincing proof.’” Johannes P. Louw and Eugene Albert Nida, vol. 1, Greek-English Lexicon of the New Testament: Based on Semantic Domains, electronic ed. of the 2nd edition. It carried similar meanings in other ancient Greek writings, such as a “sure sign or token,” a “proof,” or in the logic of Aristotle, a “demonstrative proof.” Henry George Liddell and Robert Scott, A Greek-English Lexicon, with a revised supplement 1996 (Oxford: Clarendon Press, 1843, 1996), 1768.
In one of His debates with the Pharisees, Jesus said, “It is also written in your law that the testimony of two men is true” (John 8:17). This oft-repeated concept refers back to Deuteronomy 19:15—“by the mouth of two or three witnesses the matter shall be established.” This same idea is at the heart of the American judicial system. Witnesses appear in trials to help establish the truth of the matter. Prior to the use of modern forensic experts and recording devices, reliable eyewitnesses were essential. People believe in the historicity of many past events because of eyewitness testimony without ever seeing photographic evidence for those events.
This willful rejection of the truth is well illustrated by a series of quotations from atheist philosopher Michael Martin concerning the evidence for Christ’s Resurrection.
In an effort to escape the implications of the Resurrection, Martin is willing to reject one of the fundamental principles of scientific methodology: cause and effect. Instead of bowing the knee to His Creator, Martin would rather believe in a causeless effect by which, out of all the people who have ever lived, the one who just happened to come back to life for no reason at all was Jesus, the Man who had fulfilled numerous Old Testament prophecies, lived a sinless life, performed countless miracles, and predicted His own Resurrection (Matthew 20:18–19). This is special pleading at its worst.
Martin’s statement provides a great example of how a person usually interprets the data according to his worldview. As an atheist, Martin is prepared to believe just about anything on this matter except that God raised Jesus from the dead. When a person desires to remain in his skepticism, he will develop excuses to disbelieve the obvious. Although the Resurrection of Jesus Christ was proven by “many infallible proofs” and has been recorded in God’s Word, atheists like Michael Martin will continue to reject the free gift of God’s grace and cling to their irrational humanistic worldview.
While some people reject the infallible proofs, a study of the historical evidences for the Resurrection of Jesus has been a major factor in some people coming to faith in Christ, including apologists like C.S. Lewis, Josh McDowell, Lee Strobel, and Sir William Ramsay.