I'm no expert whatsoever, because frankly it makes no difference to me, but last I heard it was accepted that Jesus the person existed.
It's hard to find trustworthy sources when I'm being lazy and so many people are trying push very biased views, but this is something, I guess. There's also a Wikipedia article about it, but I'm tired and it's dry.
Well again, it doesn't actually matter to me. I'm not trying to have a debate, I'm just saying that's what I've heard and I tend to trust experts on their own fields. You can make up your own mind about what you believe, makes no difference to me.
I don't think it's really that big of a deal if he was a real person or not, it doesn't say anything about the validity of religion one way or the other. Plus I don't think it's really that far fetched that someone could have amassed a bunch of followers and birthed a new religion. It still happens in the modern world.
Edit: I read how you've responded to everyone else. Take a break friend, people are just having a discussion with you, disagreing isn't an attack.
It's fine if you personally think the evidence isn't reliable, but calling everyone delusional and shouting down frankly well supported arguments as fake with no way to back it up all while refusing to read and engage with them isn't a good look. If you can legitimately explain why people are wrong, I'm sure they would appreciate the discussion and potentially learning something.
If you can't, then I'd suggest reflecting on why this is so upsetting to you. Believe me I absolutely understand what it's like to hate religion and to be filled with an intense desire to want it to all be wrong and evil, but that shouldn't affect how you treat people.