The most important reason anyone is an atheist

[John V]

Here is the most important reason anyone (well most) is a atheist. Our default stance is to disbelief in something until it meet the burden of proof

Holder of the burden

When debating any issue, there is an implicit burden of proof on the person asserting a claim. "If this responsibility or burden of proof is shifted to a critic, the fallacy of appealing to ignorance is committed".[1] This burden does not necessarily require a mathematical or strictly logical proof, although many strong arguments do rise to this level (such as in logical syllogisms). Rather, the evidential standard required for a given claim is determined by convention or community standards, with regard to the context of the claim in question.

.

Now religion has a heavy burden because of the extraordinary claims made, and the reason we disbelief is because no evidence that is properly verifiable has been offered to to date.

Hold on there, cowboy. The fact that religion is widespread across time and cultures shows that it meets the evidential standard determined by convention or community. This definition goes against your position.