Atheism is not a philosophical position, it is a rational and practical position.
All philosophical positions are rational and practical to those who hold them. And as such, they should be logically defensible. That's what philosophy is all about: logically defending an asserted position on the truth.
There is no objective rational evidence to justify a rational belief in the existence of God.
Of course there is, which is why so many people choose to believe in some ideal of "God". Just as there is rational evidence to support to proposition that no gods exist at all. Which is why atheist believe this to be so.
There will always be a philosophical rationale for a belief in the existence of a God(although fallacious). With regards to the God belief, most Atheists are rational not philosophical.
Everyone is "philosophical" to some degree. Anytime we defend our positions regarding the truth of reality, using logic and/or reason, we are engaging in philosophical debate.
Do you believe that the burden of proof for all extraordinary claims, does NOT rest with the person making the claims? That would be simply ludicrous.
That's right, so that when an atheist claims there are no gods (proposes this view of truth/reality), the burden of defending such an assertion becomes his. Just as to assert that 'God X' does exist, would likewise then demand that the persons asserting this be able to defend their assertion.
"Proof" is a burden that's only relevant to the individual doing the assessing, as the criteria for such is entirely subjective.