How do you know athists are more likely to crack under pressure?
So does all this mean that the winner always has a superior religion?
No the winner doesn't always have the superior religion. It is only one of many factors. Most people that crack and commit suicide are not religious.
The main reason NASA selected only Christians to walk on the moon is they did not want someone that might crack under pressure and lose it on the radio, which would probably have ended NASA funding. The atheist Soviets had this disadvantage and never walked on the moon.