Do you realize that humanity has an enormous pool of people from multiple races and cultures, which have a near death experience on a regular basis? They are called soldiers. The representation of humans groups is near perfect in the army, excepts for women obviously.

There is no evidence that near death experience can change human thinking to the "belief" in any statistically significant numbers. The only people who claim to become "believers" after such experience are probably people already on the verge of believing due to their psyche or education or both.