So many replies to reply to, I don't know where to begin...
Bottom up then.
Sergius: Nobody asked the "scientists" (except for some crackpots). If you believe in centaurs, they're real to you, so you don't need some natural philosophers to find you any proof.
I don't have a perspective on open-mindedness, I've got a definition (yay semantics) that I think could enlighten others. By throwing it out (and having it thrown right back in my face) both parties could learn something. And I'm really worried about offending people, because I A. don't want to offend people and B. this is the longest non-locked religion/non-religion thread on these forums ever and I'd like to keep it that way. I'm sorry if it sounded condescending
RAM: Personally I view killing people as wrong, in any circumstance. I also urge everyone to disregard any "socially acceptable" stuff and follow your own inner rules. Chances are they're more strict than your societies, and otherwise maybe your society's rules are wrong, and you should work on changing them. Organised religion is just another form of (sub/super)society, usually including taxes, "heads of state", citizenship, laws and rules, et cetera.
Forumsdwarf: When faced with a choice between the death of a random murdering stranger or my own child, I know/think/hope that nature will take over and I will choose the natural thing, regardless of my belief. Apart from those extremes, I choose to not-kill, even when threatened. Religion hijacking your brain is a bit far-fetched, but happens in rare circumstances. I'm not pro-organised-religion myself, for the simple reason that it can be abused by others like any other ideal (the American Way, Our People First, Purity of Race were all once untainted, well-meaning ideals).
Sordid: I'm not here to troll you or trick you or anything. Release the fear of being bamboozled. I lump in free speech with murderers because it is a list of actions that may offend people. I say yes, address the symptoms, not the "cause", because the cause is not really the cause, and the cause is not something that can be changed easily.
Example time: Sikhs need to wear a turban and a knife at all times, according to their religion. That really is a bummer at airport security. Instead of stopping being a Sikh altogether, they adapt and don't wear the knife at all times. Another example where changing your actions is possible without changing your belief. Are you saying that just because the religion sais you have to wear a knife, and wearing a knife is illegal in some places, that the entire religion is illegal?
Ridiculing people is an action I disagree with. Regardless of your beliefs. Question: So do you think ridiculing people is allowed, as long as they share your belief? So atheists may ridicule unicorn believers, but not the other way around? Or can anyone ridicule anyone, and let the world become one bitter, hostile, ridiculing place?
Neruz: That is right. I have no reason, nor the authority to question your belief of me being a unicorn. I could show pictures, but you could say I was just deluding you. Anyone else in this topic could try the same, but as it is, it'll be really hard for anyone here to prove that I am or am not a unicorn. You just believe me to be human because of Occam's razor, but nothing is to say that the simplest answer is the Only Right Answer.
Yes, I type with my horn.
G-Flex: Valid != truth. I used the term validity here as "internally consistent", which is the same meaning logic gives to it. Why are the morals sounder? Why are they pre-existing, my belief may be older? Soundness and validity have nothing to do with absolute truth or how much you agree with it or not.
To most of you: For people who hold the scientific principles and modern logic in such high regard, you've obviously not studied it well enough to be critical of it, and wield it well. (ouch! that must've hurt!) If you value criticising one's own belief so much, please do so yourself first. Read! Learn! Re-evaluate! I once was way worse than you guys (except micro!), when I was about 18. Science Is The One And Only Truth or something like that. Then my wiser then-gf gave me some Popper and Kuhn to read, that helped putting things into perspective.
Restating my belief: The scientific principles are cool, and teach us about the universe. They are however limited-by-design, and there is something else, something beyond what science or logic can ever prove.