So you are contradicting yourself by claiming the person asserting a claim that there is no God has no burden of proof on their claim???
No...
This gentleman asked the question of why his assertion that there was a god carries the burden of proof. I was simply answering him. Those who make the claim carry the burden of proof. If you want to bring something else to the conversation (like past claims that I may have made) that's fine. But note that I have made no assertion one way or another in this particular thread. I'm simply answering his question.
Regardless though, I'll still play along.
Tell me why atheism exists...
Why does the term "atheist" describe anyone at all?
Doesn't it naturally require there to be an original claim of deity in order for that word to have any meaning whatsoever?
That means that theists made the first positive claim.
We then have to ask ourselves if that positive claim was ever proven to be true.
Has that positive claim ever been substantiated by anyone throughout history?
Did the Sumerians prove their gods existed, or did they vanish into history?
Did the Egyptians prove their gods existed, or did they vanish into history?
Did the Greeks prove their gods existed, or did they vanish into history?
Did the ancient Israelites prove their gods existed, or did they vanish into history?
Did the Romans prove that their gods existed, or did they vanish into history?
Did the Nubians probe their gods existed, or did they vanish into history?
You see where this is going...
Have the Abrahamic monotheists proved their god exists, or will he vanish into history?
Atheism (or simply the direct claim that there is no god) is simply a response to an original positive claim by a theist. So how can implicit atheism possibly carry the burden or proof, since it requires theistic claims to start with?
Now, despite the fact that it is not necessary for us to to do, atheists seem to have no problem substantiating their position. It seems quite common for us atheists to spout out plenty of evidences for their being no god(s). The fact that theists don't like the implication of our substantiation, and thus reject it, isn't really our problem...
If theists are certain of their claim, and if evidence for their claims truly exists, all they every have to do is show us. Theists could show the whole world that their god is real and that their supernatural claims are fact and it would forever change the course of human progress... but they've never done it. Not once. They haven't done it because they can't, because their claim is false.