It just defies what is reasonable and what is good.
Well, if you really think about it, if the God of the Bible exists, he most probably is a pretty major asshole viewed though our imperfect eyes. "Smoking some kids 'cause their mommy and daddy need to get smoked? - kinda asshole?, all things considered, it isn't much of a stretch......
As a pretty deep Agnostic, one of my issues is what happens if god exists, and I just don't fucking like him? THEN we'd be pretty happy to let the Athiests have their way. There are worse things than not knowing.