Those people are well documented from a multitude of different sources from multiple different areas of the world. There isn't a single historian living in Jesus's time that mentioned anything about him. You'd think if there was a guy running around the Mesopotamian walking on water and healing the blind he'd have garnished the attention of actual historians elsewhere. But no, all we have is gospel writers that couldn't even agree about various events in his life or the things he said. Ever played the telephone game in school? Where the teacher whispers a short story to one student and that student whispers it to the next and so on and when it finally gets to the last student the story is drastically different than the original? Well take that game, stretch it out over 2000 years, a hundred different languages, and pass it through the hands of a thousand people who intentionally edit bits out and add stuff in, then give it to a council that gets to decide which parts stay in and which parts aren't important, and then finally, tell people that the words in the story are law and to break the law is to be condemned but allow them to interpret the words any way they want. That's the Bible.