hi, no serious historian or scholar would question the existence of Jesus. As well as the New Testament itself which compared to other historical documents has an incredible richness in the weight of manuscripts from which it is drawn.
I'm cutting and pasting below from the Alpha Course: but there are two key questions when testing the reliability of historical documents:
- How quickly after the original was written was the earliest copy made? 2. How many copies are there?
So, Herodotus and Thucydides were both written in the 5th century BC. The earliest copy that we have is around AD 900 so there's a 1300 year gap. For each of these works we have 8 copies........And yet no classical scholar would doubt their authenticity.
Tacitus: a thousand year gap between original and first copy ? total of 20 copies. Caesar's Gallic War: 950 year gap between original and first copy ? total of 9 or 10 copies.
Livy's Roman History: 900 year gap between original and first copy ? total of 20 copies.
The New Testament, written between 40 and 100 AD, the earliest copy we have is AD 130. And we have full manuscripts AD 350. So, at most, there's a 300 year gap. And not just 8 or 20 manuscripts: we have, 5,309 Greek manuscripts, 10,000 Latin manuscripts, 9,300 others.
You look at this and you see it: the New Testament stands absolutely and unapproachably alone amongst ancient prose writings ........and no secular historian would disagree with that conclusion.
There are also various other historians of the time who wrote about Jesus including Roman Historians Tacitus and Suetonis and the Jewish historian Joseph.
The real and properly interesting question is not whether he existed but whether he was who he said he was - the Messiah and Son of God.
I really would recommend an Alpha course to help you think through these questions as they are great fun, non-pressurised and encourage you to ask questions and think through answers with others who are searching.
Divine Blessings for the journey ahead!