They’re stronger than the records we have for most other historical figures.
Also I wasn’t born a Christian, lol. Weird assumption to make.
Jesus exists in basically every world religion, minus Judaism which had to make a whole entire book explaining how he apparently wasn’t the messiah and mocking Him in the process. They all hold inconsistent views. Islam claims that he was a prophet (not God) and his resurrection was merely an illusion, Judaism claims he was just a sorcerer (as did most roman sources from His time, because that’s the only way they could explain away the miracles) Hinduism sees him as a holy man, Buddhism sees him as a Bodhisattva. But Christianity follows His teaching directly which was simple:
I am The Way, The Truth and The Life, nobody gets to The Father except through me.