When asked why God would do such a thing, the answer is usually “To test your faith”.

I was brought up Christian as a child, and went to church, but this answer is a prime example of what ultimately turned me away. Such behaviour didn’t fit the image of God in my mind. My version of God was pure, loving and trustworthy, and wouldn’t scatter “tests of faith” and other such trickery around my world.

Definitely contenders, but they’d need to have killed themselves and/or their offspring in the process to win the prize (or caused their own infertility before having kids, but those are really rare).