There was an event that changed all of history. The death and resurrection of God, as evidenced by over 500 people. And that is setting aside the incredible types and number of supernatural miracles He performed while He walked around in Israel.
On top of that, Jesus Christ fulfilled over three hundred prophecies contained in the Jewish Scriptures. Their entire sacrificial system was a lead in to the work the Messiah accomplished on the cross.
Jesus Christ, who we can know personally, and that many recorded witnesses knew physically, created the universe and confirmed the process as recorded in Genesis.
Mar 10:6 But from the beginning of the creation God made them male and female.