Atheism is a claim, a worldview, and a lifestyle.
No, it is not. It is a personal statement about belief in a god. That's it. Atheists' lifestyles vary just like theists. Do you believe in unicorns? If not, how does that affect your worldview and lifestyle?
A personal statement that is a belief (yes, atheism is a belief and a belief system) that employs so many other vehicles in looking at the world and universe while stating there is no proof or very little for belief in a God.
A personal statement about belief in God, yes (i.e., I am an atheist), that requires funnelling every thought through the perspective that God does not exist (or that there is no good reason or evidence for God), thus the answers for life's ultimate questions are sorted out outside of God as an explanation. Thus, it is a worldview, a comprehensive view of the world/universe. Atheists choose to look at the world/universe by denying or ignoring that it is created by God or gods, so philosophical naturalism is usually the main vehicle, so to speak, used to examine the universe and everything in it. It is a closed system of thought (everything comes from within that system - the universe); to be consistent, everything has to be (or is) explained or originate from within the universe/multiverse, not outside it, like Carl Sagan's philosophical viewpoint of the universe as all there is, was, or ever will be.
The atheist lives as if no God exists.
Well, yeah. We just go about our lives without that belief. Not a big deal to us.
Maybe not a big deal to you, but consider what you have to believe if you deny an absolute Being who created the universe and everything in it and who has revealed to us right from wrong. So let's briefly consider just this one aspect, for now, morality. How do you explain the "good" if there is no best or if "best" is relative/subjective to an individual or group human viewpoint? What makes his, their view right? Remember, objective is different from subjective. Hitler (in his own subjective thought) believed that killing Jews was right because he viewed them as sub-human. Just because I can say it is good to allow a woman to kill the innocent unborn human being inside her does not necessarily make it right UNLESS there is an ultimate measure or STANDARD. It just all boils down to preferences (likes and dislikes). Some people love their neighbours; others like eating them - what is your preference? Thus, as an atheist, show me your way of looking at things is any "better" than mine and that your ultimate authority can be trusted and true, valid, and trustworthy. I don't believe you can do that. All you can do is tell me that you like your way of looking at things more than you like mine. Big deal, as you say. This thinking is what wars are fought over (one says it is right, the other wrong, and who is to say other than by might). So, can you determine right from wrong without BORROWING from a system of thought (Christianity) that has SUFFICIENT MEANS to justify itself; Christianity has what is necessary (an ultimate, objective, unchanging authority that has revealed Himself)? I don't believe you can, and I welcome you to try. I believe you will find, if you are being honest with yourself, that you can't live CONSISTENTLY from within your denial of God and what that necessarily curtails.
And that is just one aspect of morality. Another is how you get an ought from an is. The world, the universe, just is. It is not mindful of you; it does not care about you. It is just physical.
An ought is what should be the case. It is non-physical and intangible. Only sentient, rational, mindful beings can determine what ought to be the case. The universe, the earth, does not care if you kill your neighbour. It cannot determine the best outcome or the best way for you to live. Since you are subjective and a relative being, you need an ultimate source and one that has revealed itself to humanity for you to determine the right or what ought to be done. Other than that, your opinions are no "better" than anyone else's.
My last point, and I could add a whole bunch more, is, why, if everything is relative and subjective (i.e., no absolute, ultimate, objective, UNCHANGING standard), is there any ultimate meaning in the universe? It just is. It doesn't care. Why do you? Your very short time here means nothing in the big picture because, from an atheistic perspective, meaning is only something human beings interject and construct into this short timeframe that does not matter. Nothing matters. Yet here you are, on a debate platform, acting as if some things do matter, that it matters what we believe. Thus, once again, you are being inconsistent if you live like things ultimately do matter, that murdering 6 million Jews and 11-12 million undesirables does matter and that you, as a person, are appalled and disgusted at what Hitler did. If there is no ultimate standard, nothing that ultimately holds us accountable, 1) there is no such thing as justice, 2) human life is unimportant, 3) human values are made up and contrived, and in the big picture, nothing matters.
An atheist is a person who is their own god
Now you are getting way off base. Do you think that if I don't believe in an external god, then I must be claiming to be my own god? That's incorrect. I'm saying I don't believe in any god.
Who are you ultimately accountable to? Who determines right and wrong in your eyes, in your perspective? Is it you, or do you have a higher authority, and what makes that authority right or true to the actual case? Because you say so? Or do you, as an atheist, view some other human authority as higher than your own, determining what you do and how you live?
God said you should not kill; you shall not commit adultery, you shall not lie, you shall not bear false witness against your neighbour, you shall not steal. Honour your father and mother that your days on this earth may be long. Which ones of these do you believe are right, if any, and who determines they are right? Your subjective opinion or that of someone else?
I often point out to the atheist that not believing in God contradicts the way they live. They live as if there are right and wrong and that such a belief really matters, yet how can it ultimately matter in an amoral universe that doesn't care because it is not personal and conscious.
Here's how it works. Humans evolved in societies which work better when people don't lie, cheat, steal and kill. A small percentage of people do those things, but most of us do not. That's because it works better for us. We get along with our neighbors that way. That doesn't require a god-given morality.
So, you are telling me this is how it works. That is a belief that arises from an atheistic worldview - macroevolution. Are you sure of that?
Another belief is that you find societies work better if we don't lie, cheat, steal, and kill. I agree, but what are your reasons for believing this, because you like this idea, or because it is actually RIGHT, and to not do these things? Again, provide me with your ultimate source for FEELING the way you do and believing this is TRUE.
What happens if a significant percentage believe it is right to take from others whatever you need? Does that then become the right? What happens if a significant segment of society or the majority believes it is right and just to kill innocent Jews in the millions, or innocent Caucasians, or the innocent unborn human being in the millions? Does that then make it right, or is there a higher court of appeal other than human feelings, and if so, what authority or appeal does the atheist use? Please answer that.
And, as I mentioned earlier, what does any of this really matter is there is no ultimate justice, no judgment for what you do, whether you feel that something is right or wrong. Let me answer that; it does not matter in the least if all you are is a biological bag of atoms, some reacting one way, others another, as determined by external biological forces that randomly work with NO purpose or REASON.
If there is no God, as you BELIEVE, then there is no reason or purpose to the universe, no reason to believe that things will continue to work the same way they have in the past (uniformity of nature or natural laws which presuppose a lawgiver) in the future. Without reasoning being, why do you expect things to continue to happen in a uniform and PREDICTABLE manner??? Yet, they do.
And I suggest you don't get carried too far away by
Amoranemix and his posts if they at all influence you. Find out if he can justify and make sense of his belief system before you invest in it wholeheartedly. See how he masquerades behind his emperor's clothes. Try and find places where he can make ultimate sense of anything. I don't think you will be able to, but if you do, pass on such findings of his system of thought to me and we can test that too. He is another person crying wolf in the wilderness without sufficient justification.