There is more evidence of the historical Jesus then any other man in the history of antiquity. I study history and I have studied everyone and not one historical figure has writing dating back from the time they live. Not even Alexander the great, who no one has a problem of his existence from the works of Ptolemy.
We don't question Julius Caesar who is a historical figure that we learned about several centuries after he lived.
Hannibal Barkas and Punic wars, earliest dates are several hundred years after their occurrence.
All the characters from the Trojan Wars from Helen of Troy, Achilles, Hector and Agamemnon to king Priam, all of them where found in a copy of Homer's work, not even the original, again hundreds and hundreds of years after the fact.
Tbomz no offence but you are out to lunch. Very little is known about any historical figure and most that we learn about at the university level have only one credible source and often a very weak one that has been translated and copied from a language not even spoken today.
All Roman Generals
All greek historian
All king from the Achaemenid dynasty
All Assyrian Kings list
All have recorded manuscripts dating several hundred years after they lived.
There is not even a single manuscript on any Pharaoh. Everything we know about them is on Hieroglyphs and to top it off we didn't discover the meaning of 90% of Hieroglyphs until the Rosetta Stone, where we are still finding lots of errors and continue to change wordings and meaning.
Now ready for the good part Tbomz, Cassius Dio and Velleius Paterculus both cover Augustus and they are 2 of the primary source but according to most modern professors they are highly unreliable ohoh Tbombz that leaves only 2 more source for Augustas, Tacitus and Suetonius.
Well Tacitus eh, wait a second isn't that one of the guys that mentioned Jesus? lol....
The primary source of the famous historical figure Augustus, first emperor and founder of Rome is the same primary source that mentioned Jesus. To question Jesus' existence is to question every single historical figure who lived from 100 ad down. Plain and simple