Question #1- Is there a God?
Impossible to tell. The furthest we can get to is that the Big Bang happened billions of years ago, but where did all of that stuff come from?
Atheist or religious, you are either placing your
faith in a god creating matter or matter existing permanently. That's the part of the universe that is so fascinating: what is permanent? What is the beginning? How can there even be one, in a physical creation of matter sense?
We simply don't know, and there is nothing wrong with that. May I present
Buster's Razor: It's possible for a god to exist and for a religion to properly explain the truth of the universe, but that religion does not currently exist.
Question #2- Is the Bible reliable? (That is historically)
The Bible is not reliable historically or morally; it's nothing short of repulsive. In Mark Twain's words, "It's not the parts of the bible I don't understand that scare me, it's the parts I do."
If a god wrote the bible, then he condones slavery, women being second-class citizens, incest, arraigned marriages, racism, xenophobia, murdering your children, etc etc etc. The god of the Old Testament is a piece of shit. To convince the Pharaoh to release the Jews...he kills the first-born of every family in the empire? WUT. Sounds like a keeper.
The Bible for me is like the sewer system of a city that's been around for thousands of years, each generation builds on top of it and overtime parts disagree with other parts, gets exponentially confusing, and simply doesn't make sense from an outsider's perspective. I believe that the Bible is a collection of ancient stories that the Jews either created or gathered from their time in Babylon, it was written in different languages and translated into Hebrew and Aramaic. Then the Christians took the words and built a new belief right on top of it, with a ton of it disagreeing with the previous entrees. They translated the Aramaic and Hebrew into Greek and Latin, and a millennium later Europeans translated that into English/German/French/etc. We know for a fact that they weren't very good at these translations. Hell I just read the other day that in Hebrew letters and numbers are the same thing and it's ultra confusing (I mean Latin does work the same way...) and that's why we have totally batshit numbers in the Old Testament (e.g. Noah was like 600 years old, the Jews wandered around Sinai for 40 years, etc).
Question #3- Who is Jesus? (Real person? Fairy tale?)
Jesus may have been a real person, and a fantastic pacifist, but he wasn't god. I find his entire life to be rather illogical, and laughably inefficient. To prove to people that he is the son of god, he's going to cure a few fellows of a disease and perform some miracles... and then ask you to tell all of your friends. WHAT? He shows up in Saul's dream and converts him to Christianity and now-Paul tells people they need to convert Gentiles too? Seems like there is an easier way to show everyone "the way." Here's an idea: show up in everyone's dream, simultaneously, with the same message. Then it's undeniable. The sheer inefficiencies in getting the message out were the first signs something was up. If you're God, use a little of it and tell us you're the one truth yadda yadda yadda follow me etc etc.
I can remember asking a priest in sixth grade, after 9/11 happened and they explained to us that Muslims actually have a very high opinion of Jesus (to try and mitigate the xenophobia), "Soooo...they think Jesus was lying about being the Messiah and was just a prophet? Why would a prophet lie and why would you have such a high opinion of a liar?" And he gave me a pretty crappy answer of "History = his story. They lied on that one.." But in Eighth Grade I transferred to the nonreligious Maumee Valley Country Day and had Muslim classmates and I asked them the same question and they said "The apostles and such took Jesus' message of pacifism and drastically altered it. He didn't mean that he was THE son of God, but that we are all God's children and should be peaceful." That blew my brain for a while, and sure enough the Christians in the first few centuries didn't have their message together AT ALL. It took until ~325 AD, and a Roman emperor demanding it, for some of them to settle on the idea that Jesus was indeed the one and only son of God and that all other beliefs are blasphemy and should be killed... (how Jesus-like).
Jesus seems like a fantastic guy to listen to, if you grade on a curve, but he wasn't god.