Is atheism a belief?

[fredd bear]

Perhaps because the majority of them are, like you, agnostic atheists?

No.

I'm not sure. It could be an emotional things, as beliefs about religion tend to be. The proud atheist claim that our lack of belief is due to reasoning alone, I think is nonsense as a generalisation. We human beings are simply not that rational. Of course, we DO have reason and facts on our side, which religious believers do not.  

Who can say the why of anything for any other person, even ourselves at times.?

Making a claim about God/supernatural/ paranormal/ psychics, etc etc attracts the burden of proof. The agnostic and 'soft' atheist does not have that burden , he states a position, but makes no claims.

A person who asserts 'there is no god" or "I believe there is no god" may be asked to prove those claims, just as much as the same demand is made of theists..