The tsunami in and of itself is not evil, it's the fact that the tsunami killed a quarter million and god supposedly has it in his power to stop it. And since mountains are nothing but the film of dust on a scale to him, we are to believe that it would have taken negligible effort on his part to stop it.
This is akin to a father standing over his infant child as it lays in a shallow puddle, watching as a light rain slowly makes the puddle deeper until the child drowns. It would've been negligable effort for the father to pick up the child and keep it alive. If a father actually did this, I have no doubt that he'd be tried and convicted not only under our current system of laws, but under the mosaic law that god supposedly handed to isreal himself.
Why is it that god cannot be held accountable to the very laws that he has given mankind? It is said that his sense of justice is so extreem that he had to pay a debt to himself with the death of his son, but you're telling me that he can't be held accountable for preventing the loss of life that serves absolutely no purpose except to make people who believe in him question their faith?