Events such as the Asian tsunami are incompatible with other things that christians claim to know about god. All attempts to explain god's actions result in a story that is internally contradictory.
If the Bible said that God was comprehensible to humans you would have a point, but it doesn't. It teaches the opposite. The Bible at various points says that God is:
1. Righteous and good.
2. All powerful.
3. Not comprehensible to the human mind.
So the fact that we cannot find a reasonable answer to the problem of suffering does not disprove the God of the Bible, it affirms his inscrutability as stated in the Bible. You are only looking at the fact that God is good and almighty when formulating your argument, and excluding the equally strong description of God in the Bible as inscrutable or incomprehensible to humans.