It is tempting to blame it all on the unreliable handings-down of multiple strands of oral historians. Just as with evolution, geographic separation means that one version of the gospel acquires changes in one section of the story but the version in the neighbouring country gets changed in a different section. Just as when extracting a historical narrative from multiple sources, you can tell facts from embellishments because facts are consistent across all versions. (Give or take the tendency of some people to edit out things which did happen because they were deemed unimportant or boring).
Tempting, but I think the oral history idea unfairly implies an illiterate society because the Jewish culture of that time had the Torah, which (I think) all congregants have to read aloud from, at one stage or other of their lives.
I've seen atheist memes which, nevertheless, attribute it all to the musings of illiterate goat-herds or shepherds and I can just imagine the reactions of the literate Jewish folk being doorstepped by peddlars of Christianity. If you have a hard time selling your faith, I can see how tempting it would be to 'soup up' the tale, to impress the audience.
If a camel is a horse, designed by a committee, then the bible is a bit of a camel too. It's as if they chose to include all the gospel versions in an attempt to please everyone (to stifle the kind of sectarianism we see in the present day), whereas they should have pared it down to one version so as to present a consistent message to posterity.
Anyway, it is a matter of curiosity how or why a supposed threat - a rebel leader, at the least or "king of the Jews", at the most - could go through trial and execution without leading to any written account, or report back to Rome, which one of the later historians could cite in their work, decades or centuries later.
Regarding the ossuary, the possibility of him being a normal bloke with a normal family life rather undermines any sense of divinity in him. I think the bible's editors would have chopped any record of that out at the earliest opportunity (the doubters would only have leapt on it).