Your beliefs require that the Roman Empire was full of ridiculously stupid and arrogant people. Your comparison to people who believe the earth is flat despite the fact that people have sailed around the earth and we have satiate pictures of the earth's shape as compared to people believing that Jesus had been resurrected despite having been shown the body does not work, by the numbers alone. Don't even go in to evolution and dating of the earth evolution has been proven among scientist, I know more about then my parents and the proof I've seen is not deceive on proving it, and the dating of the earth is simply scientist saying the dates witch does not give proof to the general public the dates. Had christinity been just a small group of people the Romans and Jewish officals would not have tried so hard to end it.
Now on the fact that you are referring to the Bible as a 2000-year-old book to discredit it is worthless. Using that philosophy I can discredit any old writing. Your demand that I back up every event of the bible by another non-Christian source is absurd. It's not like non-Christians were dying to make every little point in the Bible have an outside reference. The dates in witch the Gospels and Acts were written along with being specific on facts such as where he was crucified where his tomb is combined with when this events took place such as Passover and Pentecost guarantees that the gospels and acts are what people have heard. If I was to claim that 30 years ago New York Jake Ryan had been shot 33 times and then buried in the tomb of a NYC city hall councilor, and that 3 day's latter the tomb and I had been preaching that Jake had risen from the grave and that he preformed miracles unless New York has just suffered a complete brain loss of the last 30 years no one would believe me unless I had done so. The gospels in no way could have changed what the apostles were saying.