Please keep in mind that I'll be the first to say that I don't know your original denomination, your background, or the amount of thought that you've put into this. However, you invited comments, so I'll comment on atheism in general.
While Christianity is a matter of believing testimony and evidence (of which there is a lot, but that is for another post), whether God exists is a matter of proof and what is reasonable. Whether the theist has the burden of proof b/c he's the one demonstrating or the atheist b/c he's disagreeing with more than 90% of the men who ever lived or are living, doesn't really matter.
First, questioning isn't critical thinking; reasoning out answers is. If the loving God were to send a man to hell for this, it wouldn't be for thinking but rather for laziness & giving up. After all, whether God exists is among the most important questions a man can consider; an answer radically changes how we see & what we do with life. Besides, why would it be out of character for a loving God Who lets men choose not to care about Him in life, to let men choose not to be with Him after death?
Second, talk about man's need to make a god is sophistic; it makes the towering assumption that the universe/nature is ultimately absurd, that it produces desires that have no basis in reality. Men can only get hungry because food really exists. Men can only get sleepy because sleeping really exists. Men can only long for money, power, fame because they all really exist. If men observe that they have a need for God, then it is evidence that He exists, not the contrary. An absurd universe throws science/reason out the window and makes any discussion nonsensical.
Third, the big bang theory is no solace for the atheist. It is a complicated theory of how the billiard balls of the universe exploded outward at the very beginning. But anyone familiar with billiard balls knows that they don't move unless they are moved/hit by something else. It is basic physics that everything in the material universe is like that. Since an infinite regression of balls being hit by another ball is absurd and really no explanation, for us to have any moving balls now, there must have been an original mover, not moved by another (making this mover quite different from the rest). Men have named this unmoved mover God.
Feel free to comment back. Sorry about the length.
plague10
Its a tough decision to reject god, especially for someone who was once very religious, u deff have my respect