This is a HUGE problem and pretty much proves that either their god is incompetent/foolish or that the faith alone concept is BS
Or it could be that things are not as simple as they seem...
If God is bound by certain constraints (perhaps of His own making) then it is not too hard to imagine scenarios where this would appear to be the end result. But then I'm off into gnostic-type heresies again.
The oh-so-simple message of evangelical Christianity is not something I can accept as-is. If God's sense of justice is *eternal* punishment for those guilty of simply being born with Adam's sin, even if He has thrown us a life-line in the form of His Son, Jesus, then He can stick it. And I've told Him so... several times...
But personally, I think it is much more complicated than this...