Why are there so many murders and atrocities in this world when there is supposed to be a God, who is moreover generous and of good nature?
Religious persons often answer this question stating that God gives us the freedom to do anything we want, even cruel things. So we are apparently free to commit crimes or to act even against the rules and laws of the Bible itself.
This reasoning has a flaw, however. Since God actually punishes people for their crimes after their death, this “freedom” does not exist. When you point a gun to somebody’s head and tell him he is free to go anywhere he likes but you shoot him when he does, he is obviously NOT free.
But what if God did not punish people?
Then why would I have to follow the rules of the Bible, having nothing to fear? Rules and laws need an enforcer and if God did not play this role, rules would be pointless, since anybody could just bend and break them if he so desired, without a retribution. Murderers or rapists who are not caught by us humans could then avoid any kind of just judgment. How would that be fair?
To summarize:
If God indeed existed, there are several possibilities:
1.He punishes people who act against his will. Assuming the Bible really
reflects his ultimate will, those would be, among others, criminals,
sinners and even atheists. This would mean that humans are NOT free,
contrary to the sermons of his followers.
2. The Bible does NOT reflect God’s ultimate will. Maybe, he just
punishes murderers, rapists and other “really” bad persons? We would
still not be completely free, but we would be free on an acceptable
level. However, Christianity and Judaism would lose their raison
d’être. The Old and the New Testament would no longer be any kind of
justification since you could not discern the rules that reflect God’s
will and those that don’t. (In my opinion, the Bible cannot be the
fundament for anything, since it contains far too many flaws and
contradictions. Maybe I’ll dedicate a post to the flaws of the Bible
sometime later.)
3. He does not punish anyone, meaning there is no
divine judgment and no ultimate justice. Moreover, the problems of
point 2 still apply.
Bonus option:
4. God does not exist.
This is my favorite answer to almost everything, since it resolves so
many fundamental issues and questions. Furthermore, it does not have
flaws. 
