What we have here is another take on the problem of evil which can be summed up thus:
1. The world is characterized by vast amounts of intensive and extensive suffering and evil.
2. After enduring a life of hardship and pervasive suffering, many (if not most) humans will end up in hell, where they will be actively tortured forever and ever.
3. All of this was known ahead of time by God, before He had even created ANYTHING or ANYONE.
4. For some reason or motive, He "went ahead" with the plan anyway, but could have chosen to not implement it (or to start a different one altogether) or to interrupt it before it "went bad".
I don’t believe in huge cut and paste jobs – usually, so, I’ll just post the link to an article that does are thorough and well thought out job of the issue. It is lengthy, but does address the question in the best fashion that I have ever seen it addressed.
http://www.christian-thinktank.com/gr5part1.html#_Now,_with_all