RE: How did I become an atheist?
You're still a sinner in need of a savior. Your desire to not believe in God changes nothing.
Jesus was born as a child yet he was fully God. He lived. Performed miracles. Died on the cross. Rose on the third day. There are multiple eyewitness accounts in the Bible of the risen Christ. As Paul said,
(1 Corinthians 15:3-8 NIV) For what I received I passed on to you as of first importance : that Christ died for our sins according to the Scriptures, {4} that he was buried, that he was raised on the third day according to the Scriptures, {5} and that he appeared to Peter, and then to the Twelve. {6} After that, he appeared to more than five hundred of the brothers at the same time, most of whom are still living, though some have fallen asleep. {7} Then he appeared to James, then to all the apostles, {8} and last of all he appeared to me also, as to one abnormally born.
Thank you for your interest in my post, and even in my own fate. However, I think that Paul's "Messiah according to the Scriptures" idea is a rather poor choice to prove your point.
Why? Let me explain. I'm sure you've read carefully my arguments before writing your comment. So you know that one of my main reason for losing my faith was the use of "bad" (Deutsch), ad hoc explanations in the theologies based on Holy Scriptures. And here, in the Christ theology of Paul, we have a perfect example of this very procedure.
Here is Paul's problem: there was no " Christ died for our sins (...) he was buried, that he was raised on the third day" prophecy in the Scriptures available at Paul's time. So what the Christian theology since Paul's time is doing? Theologians look for ANY prophecy in the Scriptures, concerning ANY figure (Son of Man, Suffering Servant etc.) - and they use those prophecies as "Messiah prophecies".
It works also like the lottery: if you have tens and hundreds of stories in tens of books (the Bible), then you can always find a story of SOMEBODY close in some details to Jesus real-life story, or anybody else story. As @orenshani noticed is just probability use for an apologetic purpose.
You're trying to prove your religion is right by citing that same religion's texts. With that logic, you could believe in Spiderman instead of Jesus because there are comics that prove Spiderman existed. This just doesn't make any sense.