You are correct. There is almost NO independent historical evidence to back up Jesus. That is why Christians must meet Him face-to-face in order to believe.
Christianity is not based purely on "belief," it is firmly based in logic. Read Aquinas, read Augustine, read C.S. Lewis. The answers to all questions about Christianity are out there, if you seek them.
The poster who is ranting against Christianity and slandering Saint Paul sounds like Dan Brown's little brother. Lots of heat, no light.