"As a lawyer, as a judge, I would seriously regret people charged with such crimes such as genocide and crimes against humanity being granted amnesty... I think those are the sort of crimes which politicians do not have the moral right to forgive." - Judge Goldstone
An argument based on morality is often of convincing value in everyday conversation but it is not backed up by the power that is the positive law. There exists a moral duty or obligation to prevent harms being caused to individuals. It is natural for human beings to avoid and in some circumstances prevent a catastrophe like Rwanda.