No. Some simply claim that there is no sound evidence that God does exist. Many people, including a number of atheists, would say that it is logically impossible to prove that something doesn't exist.
The burden of proof lies with the person that holds that something does exist not the one that hold the position that something does not exist.
No. Atheists make no such claims or any other "claims". They simply do not believe in gods. Think of it this way: Someone who does not eat meat does not claim that meat doesn't exist.
Atheists.
No. Atheists don't believe in any god claims, The rationalzation being, you can't have a problem with something that hasn't been proven to exist. It would be more accurate to say, "Some Atheists have a problem with people doing hurtful things in the name of their god."
Atheists.
No one has proven that God does not exist.
Insist what? New Atheists insist everything other Atheists insist. The Denial of the claim there is a God by Theistic religions.
An atheist is one who doesn't believe in a god or gods. Note that this is not necessarily equivalent to the claim that a god (or gods) exist; for many atheists, it's more like doubting that a god exists, until sufficient evidence is provided.
Atheists do not believe in a god/gods or higher power. Agnostics do believe in a god/gods but believe their/its existence or lack thereof can not be proven. This does not imply the lack of a religion as by this classification Buddhists are atheists.
How can someone claim that God does exist when he does not know everything there is to know to rule out the possibility of God's non-existence??
In breif, to be an atheist is to not accept any world view that requires the existence of a deity. There is no proof of a deity that can be presented that is testable by commonly applied proofs or by scientific logic. If it can't be proven then it doesn't exist.
No, it doesn't mean that. Even if God doesn't exist, it's probably impossible for it to be proven scientifically.
They don't have any. That's the definition of "atheists" - "no god."
No. An atheist only says they will not believe because there is no varifiable evidence to support the god claim. This is very different than saying, "there is no god". An usual example of this is: I say I have faith there is a tiny teacup orbiting the rings of saturn...can you prove me wrong? No, but without real evidence, it can be dismissed as impossible.