Well let me put it this way. If we take, for an example, the historical evidence of Jesus, the question here is how reliable is the evidence. Existence of somebody who lived 2000 years ago can only be found in historical documents. If we take evidence from reliable sources I would find evidence to be true and since I started this question here I will list sources I find evidence of Jesus's existence true (source for this is website gotquestions.org):
- First, as I mentioned already, Roman historian Tacitus in his Annals
- Flavius Josephus, the most famous Jewish historian in his Antiquities. There is a controversial verse (18:3) that says, “Now there was about this time Jesus, a wise man, if it be lawful to call him a man. For he was one who wrought surprising feats....He was [the] Christ...he appeared to them alive again the third day, as the divine prophets had foretold these and ten thousand other wonderful things concerning him.”
- Julius Africanus quotes the historian Thallus in a discussion of the darkness which followed the crucifixion of Christ (Extant Writings, 18).
- Pliny the Younger, in Letters 10:96, recorded early Christian worship practices including the fact that Christians worshiped Jesus as God and were very ethical, and he includes a reference to the love feast and Lord’s Supper.
-The Babylonian Talmud (Sanhedrin 43a) confirms Jesus' crucifixion on the eve of Passover and the accusations against Christ of practicing sorcery and encouraging Jewish apostasy.
- Lucian of Samosata was a second-century Greek writer who admits that Jesus was worshiped by Christians, introduced new teachings, and was crucified for them. He said that Jesus' teachings included the brotherhood of believers, the importance of conversion, and the importance of denying other gods. Christians lived according to Jesus’ laws, believed themselves to be immortal, and were characterized by contempt for death, voluntary self-devotion, and renunciation of material goods.
-Mara Bar-Serapion confirms that Jesus was thought to be a wise and virtuous man, was considered by many to be the king of Israel, was put to death by the Jews, and lived on in the teachings of His followers.
-Then we have all the Gnostic writings (The Gospel of Truth, The Apocryphon of John, The Gospel of Thomas, The Treatise on Resurrection etc.) that all mention Jesus.
And this one is the first logical evidence anyone can come up with: Perhaps the greatest evidence that Jesus did exist is the fact that literally thousands of Christians in the first century A.D., including the twelve apostles, were willing to give their lives as martyrs for Jesus Christ. People will die for what they believe to be true, but no one will die for what they know to be a lie.
And to make this more interesting, I would like you to point to me evidence that would disprove evidence for Christianity to be true.