The most important reason anyone is an atheist

[Angrboda]

Consciousness is not physical therefore can not be studied by physical science.

Prove it.

(And no, NDEs do not prove it. It's not clear what NDEs are or what causes them, and until it is, they are not proof. Until you can provide evidence as to what they actually are, they are not themselves evidence for anything else. If NDEs and 'auras' are all you have for proof, then you have no proof.)