I've read all the other replies you've gotten, and I'm not sure how much I can add or shed light on the question, but, being an atheist myself, I'll give it a shot.
First off, you could pretty much take everything you said and flip-flop it for me. I grew up in a home where, if my parents did have any religious beliefs or preferance, they kept it to themselves.
I never gave religion much thought one way or the other until my early twenties. I have to admit, I went through a religious "phase", bought a small crucifix necklace, tried my hand attending several different churches.
For a short while, I truly had myself convinced I was a "believer". Then I guess I just woke up one morning and realized... I wasn't. I had truly made an effort, it just never felt real.
For most people, to try and explain how a computer works, or their cell phone works, they would be lost. Almost as if it were magic. But we all know that's not true, over the last hundred years or so, we've pretty well mastered electricity and learned how to make it do some seemingly miraculous things.
You may not completely understand how a computer does what it does, but obviously some genius does in order to figure out how to build one. It's those same kind of geniuses that have figured out things like the history of the universe and the origin of life.
Nobody questions that a computer or cell phone works (most of the time). Yet a lot of people question the "big bang" and evolution because, unlike a computer, they fly in the face of established religious beliefs... despite the fact it was the same kind of scientists and engineers that figured them all out.
Beyond that, to me, there are way more unanswered questions as to the existance of God then there are to the non-existance. I guess I tend to see religion, in all it's varied forms, as a way to cope with the natural fear of death.
Personally, it doesn't bother me too much, I look at the year 3000 the same way I see the year 1900. I didn't exist in 1900, and I won't still exist in 3000. I would rather acknowledge that fact and enjoy the relatively short life I'm going to get as much as I can while I have the chance.
Not trying to be abrasive or offensive, as I have no issue with people of faith (except maybe scientologists... they're just creepy!)... just trying to provide some insight. Hope this helps.