If there's a God then why are there evil and suffering in this world?

The strongest argument against the existence of God is the evil and suffering that exist in this world. That said, a statement like the title is contradictory when you think deeper.

If there's evil, there has to be good.
If there's good, there has to be a moral framework.
If there's a moral framework, there has to be a moral law.
If there's a moral law, there's a moral law giver (which the question is trying to disprove).

Conversely if there's no moral law giver then there's no moral law.
If there's no moral law then there's no moral framework.
If there's no moral framework then there's no good.
And if there's no good then there's no evil.

So what is the question really asking? --> Why does God allow evil and suffering to happen? We'll have to tackle this another time.