Let me wish you a merry Christmas.
Now, many atheists are agnostic, as am I. As I have gone through life searching for truth, I have arrived at a point where the argument for the existence of god has been outweighed as I learn more and more about the universe, and the history of life and the inhabitants on our little planet.
I have no way of knowing whether there is any god, allah, zeus, etc. (google the list sometime) My intention is to respect the views of harmless individuals no matter what they believe. How could I be sure - and that is the point - the people who are sure, look at what they have done and continue to do.
Even now a new member named "atheists are scum" is walking the halls. I hope he doesn't have a gun. I am sure he could find a passage allowing him to use it on atheists. You, on the other hand, being a good cafeteria Christian, may ignore those passages and concentrate on the parable of the good samaritan. That makes you hopefully safe to, say, Taoists, Buddhists, followers of Confucianism, and Hindus, just to name several of our brothers and sisters around the world.
My guess is the brilliant people ( I am certainly not one of them, possibly a B student on my best days) you cited above also looked at the landscape and realized "being sure" isn't well thought out and leads to wars and all sorts of merriment.
Question for you - there are many atheists that think Jesus himself is a myth, and there is good historical evidence to raise the question - search back through the arguments here. There is also a group called Atheists for Jesus, who don't believe in a god but do "get" the message of love and think a real person named Jesus existed.
Jesus himself said over and over, I am the son of man. That phrase gets used many ways, but, for yourself, if you learned that the truth was - Jesus was not the son of god - how would that effect your life?