I took you seriously enough to make a post revolving completely around YOUR questions. I thought that you were sincerely curious about what atheism is. But, I apologize for thinking that you'd understand humanity (and by extension, atheists OR theists) in general. We all breathe the same air. We all live on the same planet. We all love. We all think. I'm sure that, in any given day, you pass by several atheists. We do, pretty much, whatever you do. With the notable exception that we do not believe in a deity.
For you, that exception is, apparently, beyond comprehension. But, I suspect you may have had a taste of that exception. In your response(s), you've spoke about Allah: why don't you believe in him? For me, your rationale for disbelief in Allah is irrelevant to the point (but I am curious). The bottom line is that despite centuries of Islamic history and culture...despite the fact that a large number of people believe in Allah, and despite the fact that people believe in Allah so deeply that they would commit terrorist acts to defend him - you don't believe he exists. That's, essentially, how I view your deity. Simply because there is adoration or a following does not. make. it. true. If, tomorrow, ten of my closest atheist friends suddenly believed in your deity, then I would still ask them for proof. I would treat them as I've treated you.
For you, your belief in a god and the ways in which you worship that god dominate things other than just your mind. Your methods of worship and beliefs have fed you into a subculture of humanity...with all the rites, rituals, and mythology that often come with differences in culture. And, that's all this is. We have different cultures. Your culture tells you that the mystical and the unseen are more valuable than the tangible and real. Your culture tells you that there's a divine judge and jury. Your culture has conditioned you to accept the illogical and the irrational.
By contrast, the culture of atheism (if you will) has instilled different values in those who choose the culture. We value the truth - even if the truth is unpleasant or ugly. We value the beauty of what is real and tangible. As such, we're conditioned to use logic and reason in all parts of our lives.
But, just as you probably can't find two theists with exactly the same beliefs or qualities, you're not going to find two atheists with the exact same beliefs and qualities!! Like the members of your church, or your other theist friends, we (as atheists) have come together on blogs, and in public, to enjoy each other and learn from each other. We're a community - without a church, without a priest, without Bible studies and MOPs... but, a community just the same.
So, when you voice such disbelief or understanding about atheists, I wonder "why?" We're just like you... with one less belief in a deity than you. All of the other differences (or similarities) are no different than the differences or similarities of your other friends. When you voice such disbelief and misunderstanding, I have to wonder if you are intentionally insulting atheists so that you can tell yourself how special you are (because of your belief in a deity)? It's easier to look down your nose at someone than to actually stand face-to-face and hear them. Why don't you try getting to know us as humans before focusing so much energy and anger at our beliefs?
Ciao' for now,