The paradox of an atheistic viewpoint

A hot topoic in many debates regarding ethics: Hitler, Stalin and other dictators.
These people are often considered the most evil of people to have ever lived, because of the huge numbers of deaths they caused.

A number of people even go so far as to conclude that 'God cannot be good, because He is the one who created such people.' And this is usually followed by a statement that God not being good is a contradiction, and therefore God surely cannot exist at all.

So, it is a problem for there to be evil people on the earth.

And yet, in the Bible there are numerous accounts of evil people being killed: Noah and the flood, the destruction of Sodom and Gomorrah, to name just two. The very same people mentioned above also often say that 'God cannot be good, because He caused so many deaths.' This is often followed by a statement that God is essentially the same as Hitler.

So, it is a problem for evil people to be removed from the earth.

The bigger problem - the problem that continues to go unsolved - is that this paradox slips by unnoticed. Two views which seem to be good - no one should create something that is evil, and mass muder is inherently wrong - rule out the possibility of a supreme Goodness (God).

So, if God does not exist, and there is no absolute good standard, then who are we to rule that ethnic cleansing is evil?

But the problem can be solved:
- God created people to have free will (which includes the freedom to rebel).
- Some people rebel.
- God doesn't like the evil behaviour.
- In the Bible, God destroyed the evil behaviour by also destroying the human it came from.
- Jesus came to bring God's mercy (not destroying the human), giving more chances for people to change their behaviour.

The problem we have now is that people turn God's mercy against Him, by saying that a loving God would surely not allow such evil in the world.

Of course, the other problem is that people abuse the chances that God gives: they live a life however they please, because they think God allows all behaviour (or say that He doesn't exist because there is not immediate punishment), then they get angry at the notion that God might deem them 'not worthy.'