Reporting on Emperor Nero’s decision to blame the Christians for the fire that had destroyed Rome in A.D. 64, the Roman historian Tacitus wrote:

Nero fastened the guilt . . . on a class hated for their abominations, called Christians by the populace. Christus, from whom the name had its origin, suffered the extreme penalty during the reign of Tiberius at the hands of . . . Pontius Pilatus, and a most mischievous superstition, thus checked for the moment, again broke out not only in Judaea, the first source of the evil, but even in Rome. . . .{5}

Now ask yourself, why are so many people blatantly lying about Jesus' existence on Earth? Strange isn't it?

They are the earliest non Christian sources writing about the early Christians. Tacitus for instance.

Here is more from a historians answer comparing Alexander the Great and Jesus

The earliest extant biography of Alexander the Great was written 300 years after his death. The earliest extant biography of Jesus was written 40 years after his death, followed by three more independent biographies within 50–60 years of his death.

If you read anything on the life of Alexander, you will find that the historians who specialize in the subject have no problem mining the extant biographies for intimate details about his life, such as his favorite food or his feelings about his mother.

And

The birthplace of Julius Caesar, for example, appears in a single primary source written 175 years after his death, and that is accepted without controversy.