Aliens and beings from other dimensions were strangely omitted as possible reasons. I suspect a conspiracy......
"The impossibility of conceiving that this grand and wondrous universe, with our conscious selves, arose through chance, seems to me the chief argument for 
the existence of God." - Charles Darwin "Everyone who is seriously involved in the pursuit of science becomes convinced that a spirit is manifest in the laws of the universe - a spirit vastly superior to that of man, and one in the face of which we with our modest powers must feel humble. In this way the pursuit of science leads to a religious feeling of a special sort, which is indeed quite different from the religiosity of someone more naive." - Albert Einstein "It was not by accident that the greatest thinkers of all ages were deeply religious souls." - Max Planck "I am very much a scientist, and so I naturally have thought about religion also through the eyes of a scientist. When I do that, I see religion not denominationally, but in a more, let us say, deistic sense. I have been influence in my thinking by the writing of Einstein who has made remarks to the effect that when he contemplated the world he sensed an underlying Force much greater than any human force. I feel very much the same. There is a sense of awe, a sense of reverence, and a sense of great mystery." - Walter Kohn "Science can have a purifying effect on religion, freeing it from beliefs of a pre-scientific age and helping us to a truer conception of God. At the same time, I am far from believing that science will ever give us the answers to all our questions." - Nevill Mott "From religion comes a man's purpose; from science, his power to achieve it. Sometimes people ask if religion and science are not opposed to one another. They are: in the sense that the thumb and fingers of my hands are opposed to one another. It is an opposition by means of which anything can be grasped." - William Bragg "I am very astonished that the scientific picture of the real world around me is very deficient. It gives a lot of factual information, puts all our experiences in a magnificently consistent order, but is ghastly silent about all and sundry that is really near to our heart, that really matters to us. It cannot tell us a word about red and blue, bitter and sweet, physical pain and physical delight; it knows nothing of beautiful and ugly, good or bad, god and eternity." - Erwin Shroedinger
Funny. In my case one thing is missing though: "5% theists forcing me to believe their views. 95% examination of the facts."
Why do people insist on quoting Darwin out of context? Here's the full quote: http://www.darwinproject.ac.uk/entry-8837 It is impossible to answer your question briefly; and I am not sure that I could do so, even if I wrote at some length. But I may say that the impossibility of conceiving that this grand and wondrous universe, with our conscious selves, arose through chance, seems to me the chief argument for the existence of God; but whether this is an argument of real value, I have never been able to decide. I am aware that if we admit a first cause, the mind still craves to know whence it came and how it arose. Nor can I overlook the difficulty from the immense amount of suffering through the world. I am, also, induced to defer to a certain extent to the judgment of the many able men who have fully believed in God; but here again I see how poor an argument this is. The safest conclusion seems to be that the whole subject is beyond the scope of man's intellect; but man can do his duty. In other words, Darwin was a fairly standard agnostic. Given that you began with a quote wrenched out of context to try to make it mean something it didn't, I'm not going to bother with the rest of them. But you may want to do some research and make sure your quotes are accurate and in context.
The very next one on their list was Einstein of all people so yeah I doubt research is their strong suit. It's actually one of the funniest posts in this thread.
What was I trying to make the quote mean? I agree Darwin, and several others who were quoted were agnostics. Are you trying to say agnostic scientists are atheists?
I don't believe anyone was killed in the name of Dark Matter, nor are there any Dark Matter cults...and Dark Matter acolytes will drop their deity in heartbeat if something better comes along...
Theists can't win without bullshatting people. It's their bread and butter. And they're REALLY REALLY good at it.
Cambodians were Buddhists/atheists...what that has to do with dark matter is a mystery known only to you...
Except there is physical evidence of dark matter, there is a gravitational force that is not explained by visible matter. There is no evidence of God.
You left out, "Believes holding such beliefs makes one intellectually superior to others and enjoys being condescending." Which would actually be about 95% of the pie there. The proof is in the pudding, buttercup. If you were really only an atheist because you have "honestly examined the philosophical and scientific arguments for and against the existence of a deity," then you wouldn't get such a kick out of trashing religion, God, and people who believe in them. Yet virtually everything you post in this section of the forum is clichéd atheist condescension. Every post is just a mean-spirited attempt to insult people who don't share your cynicism. I mean, look at your signature. You're even claiming there not to be an atheist at all. But just that other people's religions are "silly."