On a deeper level, laughter teaches us how God interacts with the world. But then the story turns upside down. The Jews went from being the target of annihilation, to being the heroes and victors. Haman is hung and the Jewish people are rescued. It was a miraculous 180-degree shift in fortune.
Human beings see the world from a finite perspective.
Since we're tied to the physical world by our bodies, we're forced to live with the illusion of what we perceive. Laughter is an opportunity to transcend limitations that blind us to seeing God more clearly. Even when things look bad, even if we're suffering, in some way it has got to be all for the best, because there's a beneficent God behind everything, manipulating events for our good. And that's the story of the Jewish people. Because today, the world is beset by jealousy, greed, violence, intolerance and fraud.